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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

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Carbazole-Based Spiro[fluorene-9,9 '-xanthene] as an Efficient Hole-Transporting Material for Perovskite Solar Cells

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Title
Carbazole-Based Spiro[fluorene-9,9 '-xanthene] as an Efficient Hole-Transporting Material for Perovskite Solar Cells
Author
Lee, Do YoonSivakumar, GangalaManjuMisra, RajneeshSeok, Sang Il
Issue Date
2020-06
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v.12, no.25, pp.28246 - 28252
Abstract
For the practical application of perovskite solar cells (PSC), it is desirable to have high efficiency, long-term stability, and low manufacturing cost. Therefore, it is required to develop inexpensive and well-performing hole-transporting materials (HTMs). In this study, we synthesized SFXDAnCBZ, which is a new carbazole-based spiro[fluorene-9,9'-xanthene] (SFX) derivative, where the central core and end-cap units consist of SFX and N3,N6-bis(di-4-anisylamino)-9H-carbazole (DAnCBZ), respectively, as an efficient and low-cost HTM for PSCs. Photoluminescence quenching at the SFXDAnCBZ/perovskite interface was more effective than at the perovskite/Spiro-OMeTAD (2,2',7,7'-tetrakis-(N,N-di-p-methoxyphenyl-amine) 9,9'spiro-bifluorene) interface. We fabricated a PSC with a power conversion efficiency (PCE) of 20.87% under 1 sun illumination (100 mW cm(-2)) using SFXDAnCBZ as an HTM. This value is comparable to that measured for the benchmark Spiro-OMeTAD. Thus, this result confirms that SFX core-based materials can be a new kind of HTMs for high-efficiency and low-cost PSCs.
URI
https://scholarworks.unist.ac.kr/handle/201301/36822
URL
https://pubs.acs.org/doi/10.1021/acsami.0c06318
DOI
10.1021/acsami.0c06318
ISSN
1944-8244
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