Volume 10, Issue 4 2101002
Research Article

Improving Hole Transport and Extraction by Interface Engineering in Perovskite Solar Cells

Lingfeng Li

Lingfeng Li

National Center for International Research on photovoltaic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091 China

Search for more papers by this author
Qianwen Wei

Qianwen Wei

National Center for International Research on photovoltaic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091 China

Search for more papers by this author
Leiming Yu

Leiming Yu

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

Search for more papers by this author
Juan Wang

Juan Wang

National Center for International Research on photovoltaic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091 China

Search for more papers by this author
Rongfei Wang

Rongfei Wang

National Center for International Research on photovoltaic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091 China

Search for more papers by this author
Tao Sun

Tao Sun

National Center for International Research on photovoltaic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091 China

Search for more papers by this author
Chong Wang

Chong Wang

National Center for International Research on photovoltaic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091 China

Search for more papers by this author
Yu Yang

Corresponding Author

Yu Yang

National Center for International Research on photovoltaic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091 China

Search for more papers by this author
Xiaoming Wen

Corresponding Author

Xiaoming Wen

Center for Translational Atomaterials, Swinburne University of Technology, Hawthorn, 3122 Australia

Search for more papers by this author
First published: 09 February 2022
Citations: 1

Abstract

Efficient carrier transport and extraction is essentially important for perovskite solar cells (PSCs). Here, an outstanding organic material tetraphenyldibenzoperiflanthene (DBP) is used to modify the perovskite/spiro-OMeTAD interface as the intermediate layer. Using time-resolved photoluminescence technique and dynamic analysis of photogenerated charge carriers, a significantly faster hole extraction and faster hole transport occurring in perovskite/DBP/spiro interface is demonstrated, this is ascribed to an intermixing layer of perovskite and thin DBP layer. The improved mobility has been further confirmed by the Hall measurement. As a consequence, the improved hole extraction and reduced interface recombination result in an improved performance of PSC, including improved conversion efficiency, mitigated J–V hysteresis, and amelioration of stability under humid conditions. This work provides a detailed insight into the transport and extraction of charge carriers improved by the intermediate layer of organic small molecules as an effective strategy for interface engineering by solution spin coating.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.