페로브스카이트 할로겐화물 박막의 발광 측정 조건에 따른 특성 분석

Translated title of the contribution: Photoluminescence Characterization of Halide Perovskite Films according to Measuring Conditions

Hyeonah Cho, Seungmin Lee, Jun Hong Noh

Research output: Contribution to journalArticlepeer-review

Abstract

Halide perovskite solar cells (PSCs) have improved rapidly over the past few years, and research on the optoelectrical properties of halide perovskite thin films has grown as well. Among the characterization techniques, photoluminescence (PL), a method of collecting emitted photons to evaluate the properties of materials, is widely applied to evaluate improvements in the performance of PSCs. However, since only photons emitted from the film in the escape cone are included, the photons collected in PL are a small fraction of the total photons emitted from the film. Unlike PSCs power conversion efficiency, PL measuring methods have not been standardized, and have been evaluated in a variety of ways. Thus, an in-depth study is needed of the methods used to evaluate materials using PL spectra. In this study, we examined the PL spectra of the perovskite light harvesting layer with different measurement protocols and analyzed the features. As the incident angle changed, different spectra were observed, indicating that the PL emission spectrum can depend on the measuring method, not the material. We found the intensity and energy of the PL spectra changes were due to the path of the emitted photons. Also, we found that the PL of halide perovskite thin films generally contains limited information. To solve this problem, the emitted photons should be collected using an integrating sphere. The results of this study suggest that the emission spectrum of halide perovskite films should be carefully interpreted in accordance with PL measuring method, since PL data is mostly affected by the method.

Translated title of the contributionPhotoluminescence Characterization of Halide Perovskite Films according to Measuring Conditions
Original languageKorean
Pages (from-to)419-424
Number of pages6
JournalKorean Journal of Materials Research
Volume32
Issue number10
DOIs
Publication statusPublished - 2022

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (grant nos. NRF-2020R1A2C3009115, NRF-2020R1A4A2002161) and a Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Ministry of Trade, Industry, and Energy (grant nos. 20214000000680).

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (grant nos. NRF-2020R1A2C3009115, NRF-2020R1A4A2002161) and a Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Ministry of Trade, Energy (grant nos. 20214000000680).

Publisher Copyright:
© Materials Research Society of Korea, All rights reserved. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons. org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

ASJC Scopus subject areas

  • General Materials Science

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