Study for Improved Photocurrent via High Concentrated Tin-lead Perovskite Precursor Solution

Hyojin Hong; Seungmin Lee; Jeong Min Im; Jun Hong Noh

doi:10.21218/CPR.2023.11.3.096

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2023 Vol.11, Issue 3 Preview Page

Study for Improved Photocurrent via High Concentrated Tin-lead Perovskite Precursor Solution 주석-납 기반 페로브스카이트 고농도 전구체 용액을 이용한 광전류 향상 연구

30 September 2023. pp. 96-102

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Abstract

Sn-Pb narrow-bandgap perovskite solar cells, which is a light-harvesting layer thicker than 1.3 micrometers, is needed to enhance the low photocurrent. The fabrication of such a thick film through solution processing is a key challenge. Here, we studied and characterized the film by using a precursor solution of increased concentration, comparing it with the universally used 1-micrometer Sn-Pb perovskite film. The increase in molar concentration clearly induced thickness enhancement, but we observed that it also created numerous voids at the interface with bottom charge transporting layer. We hypothesized that these voids might hinder the increase in photocurrent associated with thickness enhancement. By introducing methylammonium chloride (MACl), we successfully fabricated Sn-Pb perovskite film with a thickness of 1.3 micrometer and no voids. Void-controlled Sn-Pb perovskite solar cells not only demonstrated superior short-circuit current density compared to those with voids but also operated smoothly under light exposure.

Keywords

Perovskite solar cells

Sn-Pb perovskite

Photocurrent

Light absorption

Interface engineering

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Information

Publisher :Korea Photovoltaic Society
Publisher(Ko) :한국태양광발전학회
Journal Title :Current Photovoltaic Research
Volume : 11
No :3
Pages :96-102
Received Date : 2023-08-07
Revised Date : 2023-09-03
Accepted Date : 2023-09-04
DOI :https://doi.org/10.21218/CPR.2023.11.3.096

Current Photovoltaic Research ISSN:2288-3274(Print) 2508-125X(Online)

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