DataVXACS Energy LettersPaper
journal article·2024-09-13

In Situ Formation of High-pKa Cations for Perovskite Solar Cells

Pengfei Wu, Jin Hyuck Heo, Yating Shi, Shirong Wang, Minghui Li, Chuanxiao Xiao, Xianggao Li, Fei Zhang

ACS Energy Letters· Volume 9· Issue 9
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Source abstract

Abstract

Surface passivation is one of the most promising strategies for improving the illumination stability at high temperatures for perovskite solar cells. However, commonly used surface agents should be presynthesized and were usually located at the perovskite surface or interfaces, making it challenging to suppress bulk defects simultaneously. Here, we present an approach for the in situ formation of high-p K a cations ([N(Z)]-N-(Aminomethylene)guanidinium) to eliminate charge defects in bulk and interfacial sites simultaneously. Consequently, the performance is enhanced for both n-i-p and p-i-n structures, with the highest reaching ∼25.4% and 20.1% (64 cm 2 aperture area). Additionally, the treatment can be applied to extensive perovskite compositions, including triple cations, double cations, and single cation-based perovskites. The devices retain 94% of their initial efficiency after 2000 h continuous light illumination under the maximum power point tracking (ISOS-L-1), representing the best photostability among n-i-p structured devices(>25%)reported to date.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Solid-state spectroscopy and crystallography · Conducting polymers and applications

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

Affiliations

School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China

CNPC Petrochemical Research Institute Company Limited, Beijing 102206, China

Department of Chemical and Biological Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul 17104, Republic of Korea

Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201 China

Ningbo New Materials Testing and Evaluation Center Co., Ltd, Ningbo City, Zhejiang Province 315201, China

Funding

National Research Foundation of Korea · National Program for Support of Top-notch Young Professionals · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China

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