DataVXAdvanced Functional MaterialsPaper
journal article·2024-10Open access

Uniform Molecular Adsorption Energy‐Driven Homogeneous Crystallization and Dual‐Interface Modification for High Efficiency and Thermal Stability in Inverted Perovskite Solar Cells

Xiaowei Xu, Qinghao Du, Haolong Kang, Xiaoyu Gu, Chengwei Shan, Jie Zeng, Tingting Dai, Qiong Yang, Xiaowen Sun, Gongqiang Li, Erjun Zhou, Guangfu Luo, Baomin Xu, Aung Ko Ko Kyaw

Advanced Functional Materials· Volume 34· Issue 44
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Source abstract

Abstract

Abstract Interfacial defects between perovskite and adjacent charge transport layers present a significant obstacle, hindering the enhancement of power conversion efficiency (PCE) and stability in perovskite solar cells (PSCs). To address this challenge, a dual‐interface modification is proposed to aim at improving the performance of mixed‐halide PSCs. Specifically, the hole‐collecting side is modified with 5‐Aminopyridine‐2‐carboxylic Acid (APC), while the electron‐collecting side is modified with 2‐thiopheneethylammonium chloride (TEACl). The multifunctional APC enhances charge transfer by tailoring the interface between the perovskite and poly(triarylamine) (PTAA) through multiple bonding interactions, thereby suppressing interfacial nonradiative recombination. Density functional theory studies reveal that APC on the perovskite surface induces uniform adsorption energy, promoting homogenous crystallization without residual stress. Additionally, APC interlayer eliminates the localized edge states induced by the iodine vacancies near the conduction band edge. Further improvement in the device performance is achieved by passivating the top perovskite surface with TEACl, leading to well‐matched energy bands and reduced vacancy trap states. As a result, champion cell achieves a PCE of 24.87% with an open‐circuit voltage of 1.188 V. Furthermore, The dual‐interface modification improves thermal stability due to enhanced ion‐migration activation energy.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Quantum Dots Synthesis And Properties

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

Affiliations

Department of Electronic & Electrical Engineering Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting Southern University of Science and Technology Shenzhen 518055 P. R. China

Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen Guangdong 518055 P. R. China

Guangdong Provincial Key Laboratory of Computational Science and Material Design Southern University of Science and Technology Shenzhen Guangdong 518055 P. R. China

Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development of Guangdong Southern University of Science and Technology Shenzhen 518055 China

National Center for Nanoscience and Technology Beijing 100190 P. R. China

School of Flexible Electronics (Future Technologies) Institute of Advanced Materials (IAM) Nanjing Tech University (NanjingTech) 30 South Puzhu Road Nanjing 211816 P. R. China

School of Pharmaceutical and Chemical Engineering Taizhou University Jiaojiang Zhejiang 318000 P. R. China

Funding

Shenzhen Science and Technology Innovation Program · National Natural Science Foundation of China · Science, Technology and Innovation Commission of Shenzhen Municipality

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