journal article·2023-02

Efficient Inverted Perovskite Solar Cells via Improved Sequential Deposition

Peng Chen, Yun Xiao, Lei Li, Lichen Zhao, Maotao Yu, Shunde Li, Juntao Hu, Bin Liu, Yingguo Yang, Deying Luo, Cheng‐Hung Hou, Xugang Guo, Jing‐Jong Shyue, Zheng‐Hong Lu, Qihuang Gong, Henry J. Snaith, Rui Zhu

Advanced Materials· Volume 35· Issue 5
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Abstract

Abstract Inverted‐structure metal halide perovskite solar cells (PSCs) have attractive advantages like low‐temperature processability and outstanding device stability. The two‐step sequential deposition method shows the benefits of easy fabrication and decent performance repeatability. Nevertheless, it is still challenging to achieve high‐performance inverted PSCs with similar or equal power conversion efficiencies (PCEs) compared to the regular‐structure counterparts via this deposition method. Here, an improved two‐step sequential deposition technique is demonstrated via treating the bottom organic hole‐selective layer with the binary modulation system composed of a polyelectrolyte and an ammonium salt. Such improved sequential deposition method leads to the spontaneous refinement of up and buried interfaces for the perovskite films, contributing to high film quality with significantly reduced defect density and better charge transportation. As a result, the optimized PSCs show a large enhancement in the open‐circuit voltage by 100 mV and a dramatic lift in the PCE from 18.1% to 23.4%, delivering the current state‐of‐the‐art performances for inverted PSCs. Moreover, good operational and thermal stability is achieved upon the improved inverted PSCs. This innovative strategy helps gain a deeper insight into the perovskite crystal growth and defect modulation in the inverted PSCs based on the two‐step sequential deposition method.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory for Artificial Microstructure and Mesoscopic Physics School of Physics Frontiers Science Center for Nano‐optoelectronics & Collaborative Innovation Center of Quantum Matter Peking University Beijing 100871 China

Clarendon Laboratory Department of Physics University of Oxford Oxford OX1 3PU UK

Department of Physics Center for Optoelectronics Engineering Research Yunnan University Kunming Yunnan 650091 China

Center of Development and Research Yunnan Tin Group (Holding) Co. Ltd Kunming Yunnan 650106 China

Department of Materials Science and Engineering Southern University of Science and Technology (SUSTech) Shenzhen Guangdong 518055 China

Shanghai Synchrotron Radiation Facility (SSRF) Zhangjiang Lab Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201204 China

Department of Materials Science and Engineering University of Toronto Toronto Ontario M5G 3E4 Canada

Research Center for Applied Sciences Academia Sinica Taipei 11529 Taiwan

Peking University Yangtze Delta Institute of Optoelectronics Nantong Jiangsu 226010 China

Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan Shanxi 030006 China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Beijing Municipality · China Postdoctoral Science Foundation · Beijing Nova Program

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