journal article·2023-01-13

Suppressing Nonradiative Losses in Wide-Band-Gap Perovskites Affords Efficient and Printable All-Perovskite Tandem Solar Cells with a Metal-Free Charge Recombination Layer

Xinming Zhou, Hongwei Lai, Ting Huang, Chaoran Chen, Zhenhua Xu, Yuzhao Yang, Shaohang Wu, Xiudi Xiao, Lang Chen, Christoph J. Brabec, Yaohua Mai, Fei Guo

ACS Energy Letters· Volume 8· Issue 1
Publisher page

Abstract

Although the efficiencies of all-perovskite tandem solar cells have surpassed 26%, further advancement of device performance is constrained by the large photovoltage deficit in wide-band-gap perovskite subcells. Meanwhile, state-of-the-art charge recombination layers incorporate an additional thin metal film (Au or Ag), which not only complexes device fabrication but induces parasitic optical losses. Here, we first fabricate efficient wide-band-gap perovskite solar cells (PSCs) with by suppressing nonradiative losses both in bulk material and at interface. The prepared PSCs with a band gap of 1.71 eV yield an impressive open-circuit voltage (VOC) of 1.27 V, giving a small VOC deficit of 0.44 V and an efficiency of 20.8%. We then fabricate monolithic all-printed perovskite tandem devices by constructing a metal-free recombination layer, which yields an efficiency of 23.65% and a high VOC of 2.05 V. This work offers a simple yet effective charge recombination architecture for advancing the performance of all-perovskite tandem devices.
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Research context

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

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

Affiliations

Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou 510632, People’s Republic of China

CAS Key Laboratory of Renewable Energy and Gas Hydrates, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People’s Republic of China

College of Chemistry and Chemical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha 410082, People’s Republic of China

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

Forschungszentrum Jülich GmbH, Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (HI ERN), Erlangen 91058, Germany

Funding

China Postdoctoral Science Foundation · State Key Laboratory of Luminescent Materials and Devices · National Natural Science Foundation of China · CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion · Guangzhou Basic and Applied Basic Research Foundation

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