DataVXAdvanced MaterialsPaper
journal article·2022-10

Integrated Ideal‐Bandgap Perovskite/Bulk‐Heterojunction Solar Cells with Efficiencies > 24%

Xianyong Zhou, Luozheng Zhang, Jianwei Yu, Dong Wang, Chang Liu, Shi Chen, Yaru Li, Yan Li, Meiqing Zhang, Yuanjun Peng, Yanqing Tian, Jinsong Huang, Xingzhu Wang, Xugang Guo, Baomin Xu

Advanced Materials· Volume 34· Issue 40
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Source abstract

Abstract

Abstract Here, the authors report a highly efficient integrated ideal‐bandgap perovskite/bulk‐heterojunction solar cell (IPBSC) with an inverted architecture, featuring a near infrared (NIR) polymer DTBTI‐based bulk‐heterojunction (BHJ) layer atop guanidinium bromide (GABr)‐modified FA0.7MA0.3Pb0.7Sn0.3I3 perovskite film as the photoactive layer. The IPBSC shows cascade‐like energy level alignment between the charge‐extractionlayer/perovskite/BHJ and efficient passivation effect of BHJ on perovskite. Thanks to the well‐matched energy level alignment and high‐quality ideal bandgap‐based perovskite film, an efficient charge transfer occurs between the charge‐extraction‐layer/perovskite/BHJ. Moreover, the NIR polymer DTBTI on the perovskite film leads to an improved NIR light response for the IPBSC. In addition, the O, S and N atoms in the DTBTI polymer yield a strong interaction with perovskite, which is conducive to reducing the defects of the perovskite and suppressing charge recombination. As a result, the solar cell achieves a power conversion efficiency (PCE) of 24.27% (certificated value at 23.4% with 0.283‐volt voltage loss), currently the recorded efficiency for both IPBSCs and Pb‐Sn alloyed PSCs, and which is over the highest efficiency of perovskite–organic tandem solar cell. Moreover, the thermal, humidity and long‐term operational stabilities of the IPBSCs are also significantly improved compared with the control PSCs.
Source: crossref · Quality: baseline

Research context

Metals & alloysPolymersElectronic materials

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 Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China

Shenzhen Engineering Research and Development Center for Flexible Solar Cells Southern University of Science and Technology Shenzhen 518055 China

Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology) Ministry of Education Shenzhen 518055 China

Guangdong‐Hong Kong‐Macao Joint Laboratory for Photonic‐Thermal‐Electrical Energy Materials and Devices Southern University of Science and Technology Shenzhen 518055 China

SUSTech Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Shenzhen 518055 China

School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen 518055 China

Shenzhen Putai Technology Co., Ltd. Longhua District Shenzhen 518000 China

Department of Applied Physical Sciences University of North Carolina at Chapel Hill Chapel Hill NC 27599 USA

Department of Mechanical and Materials Engineering University of Nebraska‐Lincoln Lincoln NE 68588 USA

Funding

National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province

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