DataVXACS Energy LettersPaper
journal article·2020-01-10

Visualizing and Suppressing Nonradiative Losses in High Open-Circuit Voltage n-i-p-Type CsPbI3 Perovskite Solar Cells

Wei Meng, Yi Hou, André Karl, Ening Gu, Xiaofeng Tang, Andres Osvet, Kaicheng Zhang, Yicheng Zhao, Xiaoyan Du, José Garcia Cerrillo, Ning Li, Christoph J. Brabec

ACS Energy Letters· Volume 5· Issue 1
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Source abstract

Abstract

Cesium lead iodide (CsPbI3) has attracted increasing attention for its photovoltaic applications, owing to its thermal stability and suitable band gap for tandem solar cells. However, the severe nonradiative recombination losses in CsPbI3-based perovskite solar cells generally restrict their open-circuit voltage (VOC) to the range of 0.9 to 1.1 V. This work uniquely reports a method to visualize all defect-assisted recombination pathways with photoluminescence (PL) techniques. Visible and valuable insight into the reduction of defect densities on a micrometer scale was obtained by the bottom surface and bulk passivation with barium hydroxide and trioctylphosphine oxide. The dual effects successfully improve the VOC of the solar cell from 0.87 to 1.17 V. These results highlight the potential of hyperspectral PL imaging as a powerful tool to give guidance to further suppress the nonradiative VOC losses in all-inorganic perovskites.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

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

Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (HI ERN), Immerwahrstrasse 2, 91058 Erlangen, Germany

National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, No. 100 Science Avenue, 450002 Zhengzhou, P. R. China

Funding

State Administration of Foreign Experts Affairs · Deutscher Akademischer Austauschdienst · Ministry of Education of the People's Republic of China · Deutsche Forschungsgemeinschaft · China Scholarship Council · Bavarian Initiative "Solar Technologies go Hybrid" · "Aufbruch Bayern" initiative of the state of Bavaria

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