Ethylenediamine Based Surface Defect Passivation for Enhancing Indoor Photovoltaic Efficiency of Perovskite

Seok Beom Kang; Joo Woong Yoon; Chang Yong Kim; Sangheon Lee; Hyemin Lee; Dong Hoe Kim

doi:10.21218/CPR.2023.11.3.087

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2023 Vol.11, Issue 3 Preview Page Next Page

Ethylenediamine Based Surface Defect Passivation for Enhancing Indoor Photovoltaic Efficiency of Perovskite 페로브스카이트 실내 광전변환 효율 향상을 위한 ethylenediamine 기반의 표면 결함 부동화 연구

30 September 2023. pp. 87-95

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Abstract

As the demand for the Internet of Things grows, research into indoor photovoltaics for wireless power is becoming important. In particular, perovskite has attracted considerable attention due to its superior performance compared to other candidates. However, various surface defects present in perovskite are a limiting factor for high performance. In particular, deep-level surface defects caused by uncoordinated Pb²⁺ ions directly limit charge transport. In low light environments, this appears to be a more significant hurdle. In this study, ethylenediamine, which can provide covalent bonding to uncoordinated Pb²⁺ ions through nitrogen, was used as a surface treatment material for indoor photovoltaics. X-ray photoelectron spectroscopy confirmed that the uncoordinated Pb²⁺ ions were effectively passivated by the terminal nitrogen of ethylenediamine. As a consequence, a V_OC of 0.998 V, a J_SC of 0.139 mA cm^-2 and a fill factor of 83.03% were achieved, resulting in an indoor photoelectric conversion efficiency of 38.02%.

Keywords

Indoor photovoltaics

Perovskite

Ethylenediamine

Surface treatment

Passivation

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Information

Publisher :Korea Photovoltaic Society
Publisher(Ko) :한국태양광발전학회
Journal Title :Current Photovoltaic Research
Volume : 11
No :3
Pages :87-95
Received Date : 2023-06-12
Revised Date : 2023-08-16
Accepted Date : 2023-08-22
DOI :https://doi.org/10.21218/CPR.2023.11.3.087

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

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