Intermediate phase-assisted growth of CsPbBr3 for high performance of carbon-based perovskite solar cells

Bo-Yan Liu ¹He-Ming Yang ¹Yu-Dong Zuo ¹Zhi-Hao Tao ¹Jun-Chun Li ¹Ya-Jing Chang ²Guo-Qing Tong ¹Yang Jiang¹

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作者信息

1. School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China
2. State Key Laboratory of Pulsed Power Laser Technology,National University of Defense Technology,Hefei 230037,China
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Abstract

CsPbBr3 inorganic perovskites have been regarded as the promising materials in the field of photo-voltaics because of the high tolerance against environment.The high energy barrier of phase transition from lead bromide(PbBr2)to CsPbBr3 perovskite and low solubility of perovskite in organic solvent impede the further improvement of device performance in terms of CsPbBr3 solar cells.Herein,an intermediate phase-assisted growth of CsPbBr3 perovskite was proposed by introducing tetraphenylphosphonium bromide(TPPB)as additive.The TPPB is expected to react with PbBr2 in organic solvent to form an intermediate phase of[TPPB·DMF]·PbBr2,which not only effectively improves the crystallinity of PbBr2 crystals,but also greatly reduces the phase transition energy barrier,leading to uniform and compact CsPbBr3 perovskite films with large grain size and high crystallinity.In combination with carbon electrode,the CsPbBr3 solar cells yield a champion device performance of 9.57％in comparison of pristine CsPbBr3 solar cells showing a low efficiency of 8.17％.Furthermore,the intermediate phase-assisted growth of CsPbBr3-based solar cells displays an outstanding storage over 720 h.

Key words

CsPbBr3/Perovskite solar cells/Carbon electrode/Hole transport layer free/Intermediate phase

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基金项目

National Natural Science Foundation of China(U1632151)

Natural Science Foundation of Anhui Province,China(2108085ME149)

Natural Science Foundation of Anhui Province,China(2308085QE137)

State Key Laboratory of Pulsed Power Laser Technology,China(SKL2021ZR03)

Anhui innovation and entrepreneurship support plan for Returned Overseas Students(2022LCX018)

Key Research and Development Plan of Anhui Province(212023t07020005)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量40

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