Unraveling device evolution through multimodal in situ x-ray characterizations in halide perovskite photovoltaics

Naveed Rahman; Sakshi Sharma; Carlo A. R. Perini; Dina Sheyfer; Ross Harder; Barry Lai; Luxi Li; Sarah Wieghold; Juan-Pablo Correa-Baena; Yanqi Luo

doi:10.1117/12.2681910

5 October 2023 Unraveling device evolution through multimodal in situ x-ray characterizations in halide perovskite photovoltaics

Naveed Rahman, Sakshi Sharma, Carlo A. R. Perini, Dina Sheyfer, Ross Harder, Barry Lai, Luxi Li, Sarah Wieghold, Juan-Pablo Correa-Baena, Yanqi Luo

Author Affiliations +

Proceedings Volume 12698, X-Ray Nanoimaging: Instruments and Methods VI; 1269804 (2023) https://doi.org/10.1117/12.2681910
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

In situ multimodal microscopic x-ray characterizations demonstrate their unique capabilities in revealing the mechanisms of material degradation and the pathways for mitigation in energy harvesting applications such as halide perovskite solar cells. Despite the excellent device performance exhibited by halide perovskites, their sensitive nature and material interfaces necessitate a precisely controlled and tunable characterization environment to identify the sources of device performance loss. In this work, we designed an in-situ sample chamber that allows the control of various environmental conditions, including heat, illumination, and bias, while simultaneously collecting chemical (X-ray fluorescence, XRF), optical (X-ray Excited Optical Luminescence, XEOL), and performance (X-ray Beam Induced Current, XBIC) measurements on functional devices. The integrated thermoelectric cooler module of the designed chamber enables controlled heating up to 100 °C and rapid cooling back down to room temperature. This allows simultaneous multimodal XRF, XEOL and XBIC signal collections on Cs_0.05FA_0.95PbI₃ perovskite devices at various temperatures. The results show increasing homogeneity in the XBIC maps and continuous reduction in XEOL intensity, with a redshift in XEOL peak positions as sample temperatures increase. The results of the simultaneous multimodal study pave the way for improved in situ sample environments for future photovoltaic device characterizations.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Naveed Rahman, Sakshi Sharma, Carlo A. R. Perini, Dina Sheyfer, Ross Harder, Barry Lai, Luxi Li, Sarah Wieghold, Juan-Pablo Correa-Baena, and Yanqi Luo "Unraveling device evolution through multimodal in situ x-ray characterizations in halide perovskite photovoltaics", Proc. SPIE 12698, X-Ray Nanoimaging: Instruments and Methods VI, 1269804 (5 October 2023); https://doi.org/10.1117/12.2681910

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