DataVXACS Energy LettersPaper
journal article·2023-05-12

Reducing Open-Circuit Voltage Losses in All-Inorganic Perovskite Cells by Dedoping

Zijian Peng, Jingjing Tian, Kaicheng Zhang, Albert These, Zhiqiang Xie, Yicheng Zhao, Andres Osvet, Fei Guo, Larry Lüer, Ning Li, Christoph J. Brabec

ACS Energy Letters· Volume 8· Issue 5
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Source abstract

Abstract

CsPbI 2 Br is an attractive photovoltaic material due to its promising optoelectronic properties. However, the corresponding perovskite solar cells (PSCs) with p-i-n configuration suffer from low open-circuit voltage ( V OC ) and fill factor ( FF ), limiting their application in tandem solar cells. Here, we propose using the fullerene ICBA as the electron charge transporting layer (ETL), forming a better interfacial contact and enhancing the internal quasi-Fermi level splitting (QFLS). A further reduction of V OC losses of around 0.1 V was achieved by an ultrathin phenethylammonium chloride (PEACl) layer between the perovskite and the ETL. We precisely study the V OC improvement and find that passivation of surface recombination contributes only 20 mV, while more importantly, a major increase of 80 mV is achieved by dedoping the perovskite surface, which removes a non-negligible electron extraction barrier. Our results give helpful direction regarding how to further improve V OC in p-i-n perovskite cells.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

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

Affiliations

Institute of Materials for Electronics and Energy Technology (i-MEET), Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstrasse 7, 91058 Erlangen, Germany

Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen Graduate School in Advanced Optical Technologies (SAOT), Paul-Gordan-Str. 6, 91052 Erlangen, Germany

Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, China

Helmholtz-Institute Erlangen-Nürnberg (HI ERN), Immerwahrstraße 2, 91058 Erlangen, Germany

State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510640, P. R. China

Funding

Deutsche Forschungsgemeinschaft · Solar Technologies go Hybrid · China Scholarship Council

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