journal article·2022-04-20

Additive Engineering in Antisolvent for Widening the Processing Window and Promoting Perovskite Seed Formation in Perovskite Solar Cells

Cong Chen, Zhiwen Zhou, Yue Jiang, Yancong Feng, Yating Fang, Jiayan Liu, Mojun Chen, Junming Liu, Jinwei Gao, Shien-Ping Feng

ACS Applied Materials & Interfaces· Volume 14· Issue 15
Publisher page

Abstract

The chlorobenzene (CB) antisolvent is widely used to fabricate high-efficiency perovskite solar cells (PSCs). However, the narrow processing window and the strict volume ratio of a binary mixed solvent limit the fabrication of large-area and high-quality perovskite films. In this work, by systematic investigation of additives with the CB antisolvent, a universal guideline is achieved wherein a small amount of additive with a donor number between 9.0 and 27.0 kcal/mol can significantly widen the antisolvent treating time slot from 2 to 40 s while simultaneously enlarging the processor binary mixed solvent (dimethylformamide/dimethyl sulfoxide) from 7:3 to 0:10. Moreover, this process facilitates the formation of perovskite seeds as templates for perovskite crystal growth, effectively reducing the bulk defects in perovskite films. Finally, the obtained PSCs show remarkable power conversion efficiencies (PCEs) of 22.22 and 19.74% for rigid and flexible devices, respectively.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Electronics and Photovoltaics

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

Affiliations

Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong 999077, China

Institute for Advanced Materials & Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China

Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China

Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China

Department of Advanced Design and Systems Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, China

Funding

Research Grants Council, University Grants Committee · Government of Guangdong Province · Guangdong Provincial Engineering Technology Research Center for Transparent Conductive Materials · National Natural Science Foundation of China · Science and Technology Program of Guangzhou · Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Agricultural University

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