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Seok, Sang Il
Laboratory for Energy Harvesting Materials and Systems (LEHMS)
Research Interests
  • Solar energy conversion, perovskite solar cells, inorganic-organic hybrid materials and processing, solution chemistry


Perovskite solar cells with atomically coherent interlayers on SnO2 electrodes

DC Field Value Language Min,Hanul ko Lee, Do Yoon ko Kim, Junu ko Kim, Gwisu ko Lee, Kyoung Su ko Kim, Jongbeom ko Paik, Min Jae ko Kim, Young Ki ko Kim, Kwang S. ko Kim, Min Gyu ko Shin, Tae Joo ko Seok, Sang Il ko 2021-10-29T00:49:21Z - 2021-10-22 ko 2021-10 ko
dc.identifier.citation NATURE, v.598, pp.444 - 450 ko
dc.identifier.issn 0028-0836 ko
dc.identifier.uri -
dc.description.abstract In perovskite solar cells, the interfaces between the perovskite and charge-transporting layers contain high concentrations of defects (about 100 times that within the perovskite layer), specifically, deep-level defects, which substantially reduce the power conversion efficiency of the devices(1-3). Recent efforts to reduce these interfacial defects have focused mainly on surface passivation(4-6). However, passivating the perovskite surface that interfaces with the electron-transporting layer is difficult, because the surface-treatment agents on the electron-transporting layer may dissolve while coating the perovskite thin film. Alternatively, interfacial defects may not be a concern if a coherent interface could be formed between the electron-transporting and perovskite layers. Here we report the formation of an interlayer between a SnO2 electron-transporting layer and a halide perovskite light-absorbing layer, achieved by coupling Cl-bonded SnO2 with a Cl-containing perovskite precursor. This interlayer has atomically coherent features, which enhance charge extraction and transport from the perovskite layer, and fewer interfacial defects. The existence of such a coherent interlayer allowed us to fabricate perovskite solar cells with a power conversion efficiency of 25.8 per cent (certified 25.5 per cent)under standard illumination. Furthermore, unencapsulated devices maintained about 90 per cent of their initial efficiency even after continuous light exposure for 500 hours. Our findings provide guidelines for designing defect-minimizing interfaces between metal halide perovskites and electron-transporting layers. An atomically coherent interlayer between the electron-transporting and perovskite layers in perovskite solar cells enhances charge extraction and transport from the perovskite, enabling high power conversion efficiency. ko
dc.language 영어 ko
dc.publisher NATURE RESEARCH ko
dc.title Perovskite solar cells with atomically coherent interlayers on SnO2 electrodes ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85117695972 ko
dc.identifier.wosid 000709511900014 ko
dc.type.rims ART ko
dc.identifier.doi 10.1038/s41586-021-03964-8 ko
dc.identifier.url ko
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