Publications - Organic-Inorganic Nanoscale Optoelectronics

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Books/Book Chapters

W.C.H. Choy, edited, “Organic Solar Cells: Materials and Device Physics” (Springer, UK, 2013).
W.C.H. Choy, Chapter 5, “Solution-processed Metal Oxides and Hybrid Metal Oxides as Efficient Carrier Transport Layers of Organic Optoelectronic Devices” in Polymer Photovoltaics: Materials, Physics, and Device Engineering, (Royal Society of Chemistry, 2015)
D.D.S. Fung, and W.C.H. Choy, Chapter 1, “Introduction to Organic Solar Cells”, in Organic Solar Cells: Materials and Device Physics, (Springer, 2013).
W.E.I. Sha, W.C.H. Choy, and W.C. Chew, Chapter 7, “Theoretical Studies of Plasmonic Effects in Organic Solar Cells”, in Organic Solar Cells: Materials and Device Physics, (Springer, 2013).
D.D.S. Fung, and W.C.H. Choy, Chapter 8, “Experimental Studies Effects of Plasmonic Nanoparticles on Organic Solar Cells”, in Organic Solar Cells: Materials and Device Physics, (Springer, 2013).
W.C.H. Choy and D. Tao, Chapter 2, “Rare-Earth Complexes And Its Applications In Organic Light Emitting Diodes”, in Solid State Chemistry Research Trends (Nova Science Publisher, Inc, 2007).
W.C.H. Choy and E.H. Li, Chapter 15, “Diffused quantum well modulators,” in Interdiffusion in quantum wells and superlattices (Gordon & Breach, 1999), pp. 563-618.

Refereed Journal Articles

2026

D. Ouyang, Q. Kong, T. W, X. Cui, B. Zhou, J. Sun, Y. Wang, Y. Liu*, Z. Bo*, W. C. H. Choy, * "Diminishing Defect and Ion Migration in Perovskite-Organic Tandem Solar Cells by Ordered Anion-Cation Modification Approach" Adv. Function. Mater., in press.
Z.W. Gao, J. Fang, Y. Wen, L. Qiu, J. Zhang, Y. Wang, W.C.H. Choy, "Selenocyanate Driven Organic Cations Homogenization in Wide-Bandgap Perovskite", Adv. Energy Mater., in press.
M. Cui, Y. Yang, H. Gao, R. Zhang, X. He, H. Wang, H. Su, A.K.-Y. Jen*, W.C.H. Choy*, "Hydrogen Bond-Enabled Carbon Dot-Based Network for Efficient Inverted Organic Solar Cells with Prolonged Photoelectrical-Mechanical-Moist Stability". Nature Comm., in press.
S. Du, N. Du, K. Liu*, X. Li, X. Zhang, T. He, J. Li, Y. Du, X. Hou, Z. Liu*, W.C.H. Choy*, "Spatially Selective Molecular Engineering for Multiscale Defect Mitigation in Perovskite Photovoltaics", ACS Energy Lett., DOI: 10.1021/acsenergylett.5c03643.
B. Zhou, G. Zhang, H. Wang, J. Zhao, R. Zhang, H. Zhang, M. An, Y. Wang, Y. Wang*, W.C.H. Choy*, "Engineering the Assembly Freedom of Donor-Acceptor Type Self-assembled Monolayers Towards Efficient and Stable Flexible Perovskite Photovoltaics", Adv. Mater., DOI:10.1002/adma.74486.

2025

S. Ahmad, W Ali, J. Sun, B. Zhou, Z. Jiang, J. Meng, H. Wang,5, G. Wei, W. C. H. Choy*, "Sequential Organic Ligand Modifications to Dedicatedly Restructure Grain Boundary and Surface of Perovskites", Nature Commun., DOI: 10.1038/s41467-025-66478-1.
H. Liu, T. Chen, S. Chen, J. Sun, J.J. Kim, Y. Yang, G. Wei, Y. Zhang*, W.C.H. Choy*, "Tri-System Interlocking Top-Encased Structures Enabled Highly Stable Tin-Lead Perovskite Photodetection Arrays", Adv. Mater., DOI: 10.1002/adma.202502191.
D. Li, B. Lyu, Z. Long, X. Xiao, D. Zhang, J. Sun, Q. Xiong, Z. Jiang, Y. Wang, W. C.H. Choy*, "Efficient White Electroluminescence from Cu-based Perovskite Achieved by High Hole Injection Core/Shell Structures", Adv. Mater., DOI:10.1002/adma.202417678.
B. Zhou, Z. Jiang, J. Kim, Z. Wang, J. Sun, M. Guan, K. Wang, M. Huang, W.C.H. Choy*, Foldable Inverted Perovskite Solar Cells Enabled by Region-dependent Microscopic and Macroscopic Strain Relaxation, Adv. Energy Mater., DOI:10.1002/aenm.202405093.
B. Lyu, D. Li, C. Ke, H. Liang, J. Sun, Q. Xiong, J.J. Kim, Y. Zhang, G. Luo, W.C.H. Choy*, “Tribenzyl Organic Cations Carried Multidentate X-type Lewis Soft Base for High-Performance Foldable Perovskite Light-Emitting Diodes”, Adv. Mater., DOI: 10.1002/adma.202415211.

Z.W. Gao, D. Wang, J. Fang, G. Zheng, J. Sun, Y. Tao, J. Zeng, L. Qiu, X. Lu, H. Su, Y. Wang*, B. Xu*, W.C.H. Choy*, "Eutectic Molecule Facilitating and Stabilizing Photoactive Black Phase Perovskite", Nature Photon., DOI: 10.1038/s41566-024-01596-8.

Y. Yang, M. Cui, Z. Jiang, R. Zhang, X. He, H. Liu, B. Zhou, Wallace C.H. Choy*, "High efficiency of solution-processed inverted organic solar cells enabled by an aluminum oxide conjunction structure", Energy & Environmental Science, 2025. DOI: 10.1039/d4ee05337k

2024

Z.W. Wang, Y. An, X. Ren, H. Zhang, Z. Wang, H.P. Yip, Z. Huang, W.C.H. Choy*, "Device Deficiency and Degradation Diagnosis Model of Perovskite Solar Cells through Hysteresis Analysis", Nat. Commun., 15, 9647, 2024.

X. Yang, L. Kong, Y. Luo, Q. Wu, X. Xiao, Y. Wang, G. Chen, J. Zhang, I. Wang, W. Choy, Y.B. Zhao, H. Li, T. Chiba, and J. Kido, "Efficient and stable hybrid perovskite-organic light-emitting diodes with external quantum efficiency exceeding 40 per cent", Light: Science & Applications, 13, 138, 2024.

B. Lyu, D. Li, Q. Wang, J. Sun, Q. Xiong, D. Zhang, H. Su, W.C.H. Choy*, "Pattern-Matched Polymer Ligands Toward Near-Perfect Synergistic Passivation for High-Performance and Stable Br/Cl Mixed Perovskite Light-Emitting Diodes", Angewandte Chemie, DOI:anie.202408726.

D. Li, B. Lyu, J. Sun, Q. Xiong, H. Zhu, Z. Jiang, D. Zhang, Dezhong; C. Liu, W.C.H. Choy* "Ligands Optimization Governed by Solubility Principles for Pure Blue Emission in Mixed-Halide Perovskite LEDs", ACS Energy Let., 9, 3261, 2024.

C. Liu, D. Zhang, J. Sun, D. Li, Q. Xiong, B. Lyu, W. Guo,* W.C.H. Choy*,"Constructing multi-functional polymeric-termination surface enables high performance flexible perovskite LEDs", Adv. Funct. Mater., DOI:adfm.202404791.

B. Lyu, H. Lin, D. Li, A. Sergeev, Q. Wang, Z. Jiang, L. Huo, H. Su, K.S. Wong, F. Wang, W.C.H. Choy*, "Multifunctional Side-Chain Promoted Polymer Architecture Enabling Stable Mixed-halide Perovskite Light Emitting Diodes", ACS Energy Lett., 9, 2118, 2024

N. Zhou, G. Na, D. Li, Z. Jiang, X. Xiao, H. Lin, Z. Zhang, W.C.H Choy*, "Co-interlayer engineering for homogenous phase Quasi-two-dimensional perovskite and high-performance deep-blue light-emitting diodes", Adv. Opti. Mater., 2302273, 2024.

D. Zhang, C. Liu, J. Sun, Q. Xiong, X. Xiao, D. Li, B. Lyu, H. Su, W.C.H. Choy,* "Self-Stabilized Quasi-2D Perovskite with an Ion-Migration-Inhibition Ligand for Pure-Green LEDs", ACS Energy Lett., 10.1021/acsenergylett.3c02418.

X. He, F.Qi, X. Zou, Y. Li, H. Liu, X. Lu, K.S. Wong*, A.K.-Y. Jen*, W.C.H. Choy*, "Selenium substitution for dielectric constant improvement and hole-transfer acceleration in non-fullerene organic solar cells", Nature Comm., DOI: 10.1038/s41467-024-46352-2.

J.J. Kim, K. Shuji, J. Zheng, X. He, A. Sajjad, H. Zhang, H. Su*, W.C.H. Choy*, "Tri-system integration in metal-oxide nanocomposites via in-situ solution-processed method for ultrathin flexible transparent electrodes", Nature Comm. DOI:10.1038/s41467-024-46243-6.

2023

Z.W. Gao, Y. Wang*, X. Chen, Z. Jiang, M. Qin, W. Ning, B. Hu, X. Lu, W.J. Yin, D. Yang, B. Xu*, W.C.H. Choy*, "Reconstructing Subsurface Lattice for Stable Perovskite Photovoltaics", Joule, DOI: 10.1016/j.joule.2023.11.014.

S. Ahmad, M. Guan, J. Kim, X. He, Z. Ren, H. Zhang, H. Su, and W.C.H. Choy*, "High-quality Pure-phase MA-free Formamdinium Dion-Jacobson 2D Perovskites for Stable Unencapsulated Photovoltaics", Adv. Energy Mater., DOI: 10.1002/aenm.202302774.

Q. Wang, H. Zhu, Y. Tan, J. Hao, T. Ye, H. Tang, Z. Wang, J. Ma, J. Sun, T. Zhang, F. Zheng, W. Zhang, A.H.W. Choi, W.C.H. Choy, D. Wu*, X.W. Sun, K. Wang*, "Spin Quantum dot Light-Emitting Diodes Enabled by Two Dimensional Chiral Perovskite with Spin-Dependent Carrier Transport", Adv. Mater. DOI: 10.1002/adma.202305604.

G. Mei, X. Xiao, S. Ahmad, H. Lin, Y. Tan, K. Wang*, X.W. Sun*, W.C.H. Choy*, "Microcavity Design Upping Light Extraction Efficiency over 50% in High-Index Perovskite Light-Emitting Diodes", Adv Optical Mater., DOI:10.1002/adom.202300912.

J. Zheng, X. He, Y. Zhang, B. Lyu, J. Kim, S. Li, X. Lu, H. Su*, W.C.H. Choy*, "A Bottom-up Understanding of the Ligand-dominated Formation of Metallic Nanoparticle Electrodes with High Broadband Reflectance for Enabling Fully Solution-processed Large-area Organic Solar Cells", Energy & Environ. Sci., DOI: 10.1039/D3EE00697B, 2023.

J. Sun, Z. Ren, Z. Wang, H. Wang, D. Wu, X.W. Sun, W.C.H. Choy,* Kai Wang*, "Ionic Liquid Passivation for High-Performance Sky-Blue Quasi-2D Perovskite Light-Emitting Diodes", Adv. Opt. Mater., 202202721, 2023.

Z. Jiang, D. Wang, J. Sun, B. Hu, L. Zhang, X. Zhou, J. Wu, H. Hu, J. Zhang, W.C.H. Choy*, and B. Xu*, "Quenching Detrimental Reactions and Boosting Hole Extraction via Multifunctional NiOx/Perovskite Interface Passivation for Efficient and Stable Inverted Solar Cells", Small Methods, 2300241, 2023.

H. Zhang*, C. Zhao, J. Yao, W.C.H. Choy*, "Dopant-free NiOx Nanocrystals: A Low-cost and Stable Hole Transport Material for Commercializing Perovskite Optoelectronics", Angew. Chem. Int. Ed. 2023, e202219307 (pp.1-12).

X. He, C.C.S. Chan, X. Zou, S. Zhang, P.W.K. Fong, J. Kim, G. Li, X. Hu, W. Ma, K.S. Wong, W.C.H. Choy*, "Modulating the Mixing Gibbs Free Energy to Enhance Solid-Liquid PhaseSeparation for High-performance Organic Solar Cells"Adv. Energy Mater., 202203697, 2023.

H. Liu, L. Zhu, H. Zhang, X. He, F. Yan, K.S. Wong, W.C.H. Choy*, "Realizing High-Detectivity Near-Infrared Photodetectors in Tin-Lead Perovskites by Double-Side Surface-Preferred Distribution of Multifunctional Tin Thiocyanate Additive", ACS Energy Lett., DOI: 10.1021/acsenergylett.2c02055.

2022

Y. Zhang, J. Zheng, Z. Jiang, X. He, J. Kim, L. Xu, M. Qin, X. Lu, A.K.K. Kyaw*, W.C.H. Choy*, "Guided-Growth Ultrathin Metal Film Enabled Efficient Semi-Transparent Organic Solar Cells", Adv. Energy Mater., 2203266, 2022.

R. Zhang, Z. Huang, W. Chen, B. Lyu, H. Zhang, X. He, X. Hu,* Y. Song*, W.C.H. Choy*, "A self-assembled vertical-gradient and well-dispersed MXene structure for flexible large-area perovskite modules", Adv. Funct. Mater., DOI:10.1002/adfm.202210063.

S. Ahmad, R. Ma, J. Zheng, C.K.G. Kwok, Q. Zhou, Z. Ren, J. Kim, X. He, X. Zhang, K. M. Yu, and W.C.H. Choy*, "Suppressing Nickel Oxide/Perovskite Interface Redox Reaction and Defects for Highly Performed and Stable Inverted Perovskite Solar Cells", Small Methods, in press.

J. Yuan, D. Zhang, B. Deng, J. Du, W.C.H. Choy, J. Tian*, "High efficiency inorganic perovskite solar cells based on low trap density and high carrier mobility CsPbI3 films", Adv. Funct, Mater., in press.

H. Zhang, W.C.H. Choy, “Surface-reconstruction of NiOx nanocrystals makes a breakthrough in flexible solar cells”, Joule, in press.

X. Xiao, T. Ye, J. Sun, X. Qu, Z. Ren, D. Wu*, S. Ding, X.W. Sun W.C.H. Choy*, K. Wang*, "Capacitance-Voltage Characteristics of Perovskite Light-Emitting Diodes: Modeling and Implementing on the Analysis of Carrier Behaviors", Appl. Phys. Lett., 120, 243501, 2022.

R. Wang; H. Xiang, J. Chen, Y. Li, Y. Zhou, W.C.H. Choy, Z. Fan, H. Zeng*, "Energy Regulation in White Light-Emitting Diodes" ACS Energy Lett., 7, 2173, 2022.

X. Tang, Z. Wang, D. Wu*, Z. Wu, Z. Ren, R. Li, P. Liu, G. Mei, J. Sun, J. Yu, F. Zheng, W.C.H. Choy, R. Chen, X.W. Sun, F. Yang,* and K. Wang*, “In Situ Growth Mechanism for High-Quality Hybrid Perovskite Single-Crystal Thin Films with High Area to Thickness Ratio: Looking for the Sweet Spot”, Adv. Sci., 9, 2104788, 2022.

Z.W. Gao, Y. Wang*, W.C.H. Choy* "Buried Interface Modification in Perovskite Solar Cells: A Materials Perspective", Adv. Energy Mater, 12, 2104030, 2022.

Z.W. Gao, Y. Wang, Z. Jiang, B. Hu, B. Xu*, W. C. H. Choy*, "Multifunctional Ion-lock Interface Layer Achieved by Solid-solid Contact Approach for Stabilizing Perovskite Solar Cells", Adv Funct. Mater., 2200473, 2022.

S. Yang, C. Bi, W. Dong, X. Zhang*, W. Zheng, W.C. H. Choy, J. Tian*, "Electron delocalization in CsPbI3 quantum dots enables efficient light-emitting diodes with improved efficiency roll-off", Adv. Optical Mater., 10, 2200189, 2022.

X. He, C.C.S. Chan, J. Kim, H. Liu, C.J. Su, U.S. Jeng. H. Su, X. Lu, K.S. Wong, W.C.H. Choy*, "1-Chloronaphthalene-induced Donor/acceptor Vertical Distribution and Carrier Dynamics Changes in Nonfullerene Organic Solar Cells and the Governed Mechanism", Small Methods, 2022, 2101475.

Z. Ren, J. Sun, J. Yu, X. Xiao, Z. Wang, R. Zhang1, K. Wang*, R. Chen*, Y. Chen, W.C.H. Choy*, "High-performance blue quasi-2D perovskite light-emitting diodes via balanced carrier confinement and transfer", Nano-Micro Lett, 14:66, 2022.

2021

D. Zhang*, A.H. Alami, W.C.H. Choy*, "Recent progress on emerging transparent metallic electrodes for flexible organic and perovskite photovoltaics", Solar RRL, in press.

B. Yang, R. Ma, Z. Wang, D. Ouyang, Z. Huang, J. Lu, X. Duan, L. Yue, N. Xu, W.C. H. Choy*, "Efficient Gradient Potential Top Electron Transport Structure Achieved by Combining an Oxide Family for Inverted Perovskite Solar Cells with High Efficiency and Stability", ACS Appl.Mat. & Interfaces, DOI: 10.1021/acsami.1c05284.
L. Nie, W.K. Ng, Z. Liang, X. Ren, T. Yang, G. Mei, C.W. Leung, K.S. Wong,* W.C.H. Choy*, " The Upside-Down Molding Approach for Geometrical Parameter Tunable Photonic Perovskite Nanostructures", ACS Appl. Mater. & Interfaces, DOI: 10.1021/acsami.1c02318.
X. He, Y. Wang, L. Zhang, R. Zhang, J. Kim, K.S. Wong, Y. Chen*, W. C. H. Choy*, "Evaporation-free Organic Solar Cells with High Efficiency Enabled by Dry and Non-immersive Sintering Strategy", Adv. Funct. Mater, DOI: 10.1002/adfm.202010764.
D. Ouyang, C. Chen, Z. Huang, L. Zhu, Y. Yan, W.C.H. Choy, "Hybrid 3D Nanostructures Based Hole Transport Layer for Highly Efficient Inverted Perovskite Solar Cells" ACS Appl. Mater. & Interfaces, 13, 16611, 2021.
Z. Ren, K. Wang, X.W. Sun,* and W. C. H. Choy*, "Strategies toward Efficient Blue Perovskite Light-Emitting Diodes", Adv. Function. Mater.,DOI:10.1002/adfm.202100516.
H. Li, H. Lin, D. Ouyang, C. Yao, C. Li, J. Sun, Y. Song, Y. Wang, Y. Yan, Y. Wang*, Q. Dong*, W. C. H. Choy*, "Efficient and Stable Red Perovskite Light Emitting Didoes with Operational Stability > 300 h", Adv. Mater. DOI: 10.1002/adma.202008820.
Y. N. Zhang, X. He, D. Babu, W. H. Li, X. Y. Gu, C. W. Shan, A. K. K. Kyaw*, W. C. H. Choy*, "EEfficient Semi-transparent Organic Solar Cells with High Color Rendering Index Enabled by Self-assembled and Knitted AgNPs/MWCNTs Transparent Top Electrode via Solution Process", Adv. Opt. Mater.DOI: 10.1002/adom.202002108.
F. Ullah, C.C. Chen*, W.C.H. Choy*, "Recent Development in Organic Tandem Solar Cells Towards High Efficiency", Adv. Energy Sustain. Res., DOI: 10.1002/aesr.202000050.
H. Liu, H.L. Zhu, Z. Wang, X. Wu, Z. Huang, M. R. Huqe, J. A. Zapien, X. Lu, W.C.H. Choy*, "Double-Side Crystallization Tuning to Achieve Over 1 μm Thick and Well-aligned Block-like Narrow-bandgap Perovskites for High-efficiency Near-infrared Photodetectors", Adv. Funct. Mat. DOI:10.1002/adfm.202010532.
Z.W. Gao, Y. Wang, H. Liu, J. Sun, J. Kim, Y. Li, Baomin Xu* and W.C.H. Choy*, "Tailoring the Interface in FAPbI3 Planar Perovskite Solar Cells by Imidazole-Graphene-Quantum-Dots", Adv. Funct. Mat. DOI:10.1002/adfm.202101438.
R. Ma, J. Zheng, Y. Tian, C. Li, B. Lyu, L. Lu, Z. Su, L. Chen, X. Gao, J. Tang*, and W.C.H. Choy*, "Self-Polymerization of Monomer and Induced Interactions with Perovskite for Highly Performed and Stable Perovskite Solar Cells", Adv. Funct. Mater., 2105290, 2021.
H. Liu, J. Sun, H. Hu, Y. Li, B. Hu, B. Xu*, W. C. H. Choy*,"Antioxidation and Energy-Level Alignment for Improving Efficiency and Stability of Hole Transport Layer-Free and Methylammonium-Free Tin-Lead Perovskite Solar Cells", ACS Applied Materials & Interfaces, DOI: 10.1021/acsami.1c12180.
S. Wu, Z. Li, J Zhang, X. Wu, X. Deng, Y. Liu, J. Zhou, C. Zhi, X. Yu, W.C.H. Choy, Z. Zhu*, A.K‐Y Jen*, "Low‐Bandgap Organic Bulk‐Heterojunction Enabled Efficient and Flexible Perovskite Solar Cells", Adv. Mater., 2105539, 2021.
F. Ye, Q. Shan, H. Zeng*, W. C. H. Choy*, "Operational and Spectral Stability of Perovskite Light-Emitting Diodes", ACS Energy Lett., 6, 3114, 2021.
Z. Wen, F. Xie*, W. C. H. Choy*, "Stability of Electroluminescent Perovskite Quantum Dots Light-Emitting Diode", Nano Select, DOI:10.1002/nano.202100203.
B. Yang*, S. Peng, W. C. H. Choy*, Inorganic Top Electron Transport Layer for High Performance Inverted Perovskite Solar Cells", EcoMat., DOI:10.1002/eom2.12127.
C.C.S Chan, K. Fan, H. Wang, Z. Huang, D. Novko, K. Yan, J Xu, W.C.H. Choy, I. Lončarić, K.S. Wong*, "Uncovering the Electron‐Phonon Interplay and Dynamical Energy‐Dissipation Mechanisms of Hot Carriers in Hybrid Lead Halide Perovskites", Adv Energy Mater., 11, 2003071, 2021.