Prof. Fei Huang Profile

Prof. Fei Huang

Professor at South China Univ of Technology

SPIE Involvement:

Conference Co-Chair | Author

Proceedings Article | 9 October 2021 Poster

Improving efficiency of non-fullerene polymer solar cells by using non-halogenated solvents

Fei Huang, Yong Cao, Kang An, Lei Ying

Proceedings Volume 11893, 118931H (2021) https://doi.org/10.1117/12.2602631

KEYWORDS: Solar cells, Polymers, Crystals, Photovoltaics

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How processing solvents influence the overall photovoltaic performances of polymer solar cells (PSCs) remains unclear in various recently emerged new material systems. Here we systematically studied this issue by integrating an extensively used poly (3-hexylthiophene) (P3HT), or a recently developed conjugated polymer P2F-EHp, with different non-fullerene acceptors. The P3HT based devices processed with the non-halogenated solvent, 2-methylanisole in presence of 1-methylnaphthalene as solvent additive, exhibit reduced bimolecular and trap-assisted monomolecular recombination, facile charge extraction and enhanced charge carrier mobilities. Morphological investigation reveals that the optimizing crystallites, phase purity as well as nanofibrous structure is effective to the enhancement of charge generation and transport. Note that P3HT:O-IDTBR based devices processed with these non-halogenated solvents exhibit an impressive power conversion efficiency of 7.1% with a high fill factor of 75.09% on a device area of 0.05 cm2, and the efficiency remained 6.89% even in a device with large active layer area of 1 cm2 with promising thermal stability. It is also noted that efficient PSCs consisting of P2F-EHp and non-fullerene acceptors of IT-4F and IT-4Cl were developed via optimizing non-halogenated toluene:o-xylene co-solvent. The detailed investigation of film morphology demonstrated that the co-solvent appeared to assist the manipulation of crystal coherent lengths and effectively decrease the phase separation of the corresponding blend films. Of particular importance is that this material system is compatible with the low-cost blade-coating technique and can be processed under ambient conditions without post-treatment. A remarkable power conversion efficiency of 10.1% was achieved by blade-coating the P2F-EHp:IT-4F:IT-4Cl blends in air. The results indicated that using non-halogenated solvents is a promising candidate for constructing efficient PSCs toward practical applications.

Proceedings Article | 19 September 2017 Presentation

Self-doped n-type interfacial materials for high-performance polymer/perovskite solar cells (Conference Presentation)

Fei Huang

Proceedings Volume 10363, 103630H (2017) https://doi.org/10.1117/12.2272366

KEYWORDS: Polymers, Solar cells, Doping, Tandem solar cells, Electrodes, Interfaces, Americium, System on a chip, Solar energy, Photovoltaics

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The performance of polymer/perovskite solar cells (PSCs/PVKSCs) is highly dependent on the interfacial contact between the active layer and electrodes. Water/alcohol soluble interfacial materials, which enable orthogonal processing of high-performance multi-layer PSCs can greatly improve the interfacial contact as well as device performance. Traditional interfacial materials are not compatible with the large-area processing of PSCs using roll-to-roll techniques. Here, we present a series of self-doped interfacial materials with controlled doping properties and high mobility for the interface optimization of PSCs. Self-doped interfacial materials containing n-type conjugated backbone and polar side chains are prepared. It was shown that neutral amino groups undergo photo-induced doping process while the bromide-quaternized groups employ a self-doped mechanism.1 Further study on the counterions of the self-doped interfacial materials shows that the counterions can also induce different self-assembling and doping behavior with different strength, leading to varied charge-transporting properties. 2 More importantly, these self-doped interfacial materials can enable high-performance (>10%) PSCs and still work efficiently in varied thickness, which match well with the requirement of the fabrication of large-area PSCs. Based on the development of self-doped interfacial materials, a high-performance interconnecting layer for tandem solar cells was also developed, which can boost the power conversion efficiency (PCE) of tandem solar cells to 11.35%.3 Moreover, these interfacial materials can passivate the surface traps of perovskite to improve the electron extraction properties of PVKSC, leading to high-performance PVKSCs even when the thickness of interfacial material is more than 200 nm.4 The successful development of self-doped interfacial materials offers a better processing window for potential fabrication of PSCs/PVKSCs using large-area processing method. 1 J. Am. Chem. Soc. 2016, 138, 2004-2013. 2 Mater. Horiz. 2017, 4, 88-97. 3 Adv. Mater. 2016, 28, 4817-4823. 4 Adv. Energy Mater. 2016, 1501534.

SPIE Journal Paper | 16 December 2015

2,5-Dicarbazole-functioned siloles with aggregation-enhanced emission for application in organic light-emitting diodes

Long Chen, Han Nie, Bin Chen, Gengwei Lin, Wenwen Luo, Rongrong Hu, Fei Huang, Anjun Qin, Zujin Zhao, Ben Zhong Tang

JPE, Vol. 5, Issue 01, 053598, (December 2015) https://doi.org/10.1117/12.10.1117/1.JPE.5.053598

KEYWORDS: Organic light emitting diodes, Electroluminescence, Luminescence, Solid state physics, Nitrogen, Solid state electronics, Quantum efficiency, Absorption, Solids, Lithium

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Proceedings Article | 13 September 2012 Paper

Optical properties enhancement in low-bandgap organic solar cells with embedded PEDOT:PSS gratings

Wallace Choy, Fei Huang, Chuandao Wang, Chuihui Duan, Yong Cao, Xiaolong Zhu, Fengxian Xie

Proceedings Volume 8477, 847710 (2012) https://doi.org/10.1117/12.929518

KEYWORDS: Absorption, Reflectivity, Organic photovoltaics, Solar cells, Optical properties, Diffraction gratings, Quantum efficiency, Refractive index, Polymers, Interfaces

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Conference Committee Involvement (4)

Organic, Hybrid, and Perovskite Photovoltaics XXV

20 August 2024 | San Diego, California, United States

Organic, Hybrid, and Perovskite Photovoltaics XX

13 August 2019 | San Diego, California, United States

Organic, Hybrid, and Perovskite Photovoltaics XIX

20 August 2018 | San Diego, California, United States

Organic, Hybrid, and Perovskite Photovoltaics XVIII

6 August 2017 | San Diego, California, United States

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