Improving the performance of perovskite solar cells using a dual-hole transport layer

The energy loss (Eloss) caused by inefficient charge transfer and large energy level offset at the buried interface can easily restrict the performance of p-i-n perovskite solar cells (PVSCs). In this study, the utilization of poly-TPD and P3CT-N as a dual-hole transporting layer (HTLs) was implemen...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2024-01, Vol.53 (2), p.484-492
Main Authors: Song, Chenghao, Du, Huiwei, Xu, Menglei, Yang, Jie, Zhang, Xinyu, Wang, Jungan, Zhang, Yuanfang, Gu, Chengjun, Li, Rui, Hong, Tao, Zhang, Jingji, Wang, Jiangying, Ye, Yongchun
Format: Article
Language:English
Subjects:
Charge efficiency
Charge transfer
Energy conversion efficiency
Energy levels
Open circuit voltage
Perovskites
Photovoltaic cells
Polyvinyl carbazole
Solar cells
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Summary:The energy loss (Eloss) caused by inefficient charge transfer and large energy level offset at the buried interface can easily restrict the performance of p-i-n perovskite solar cells (PVSCs). In this study, the utilization of poly-TPD and P3CT-N as a dual-hole transporting layer (HTLs) was implemented in a sequential manner. This approach aimed to improve the charge transfer efficiency of the HTL and mitigate charge recombination at the interface between the HTL and PVK. The results showed that this strategy also could achieve more suitable energy levels, improve the quality of the perovskite film layer, and ultimately enhance the device's stability. IPVSCs employing the dual-HTLs approach exhibited the highest power conversion efficiency of 19.85%, and the open-circuit voltage increased to 1.09 V from 1.00 V. This study offers a straightforward and efficient approach to boost the device performance by minimizing Eloss and reducing the buried interfacial defects. The findings underscore the potential of employing a dual-HTL strategy as a promising pathway for further advancements in PVSCs. Schematic structure and improved performance of perovskite solar cells using a double-hole transport layer strategy.
ISSN:1477-9226
1477-9234
DOI:10.1039/d3dt03501h