BROWSE

Related Researcher

Author's Photo

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

ITEM VIEW & DOWNLOAD

Strain Tuning via Larger Cation and Anion Codoping for Efficient and Stable Antimony-Based Solar Cells

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Strain Tuning via Larger Cation and Anion Codoping for Efficient and Stable Antimony-Based Solar Cells
Author
Nie, RimingLee, Kyoung SuHu, ManmanSeok, Sang Il
Issue Date
2021-01
Publisher
WILEY
Citation
ADVANCED SCIENCE, v.8, no.1, pp.2002391
Abstract
Strain induced by lattice distortion is one of the key factors that affect the photovoltaic performance via increasing defect densities. The unsatisfied power conversion efficiencies (PCEs) of solar cells based on antimony chalcogenides (Sb-Chs) are owing to their photoexcited carriers being self-trapped by the distortion of Sb2S3 lattice. However, strain behavior in Sb-Chs-based solar cells has not been investigated. Here, strain tuning in Sb-Chs is demonstrated by simultaneously replacing Sb and S with larger Bi and I ions, respectively. Bi/I codoped Sb2S3 cells are fabricated using poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b']dithiophene)-alt-4,7-(2,1,3-enzothiadiazole)] as the hole-transporting layer. Codoping reduced the bandgap and rendered a bigger tension strain (1.76 x 10(-4)) to a relatively smaller compression strain (-1.29 x 10(-4)). The 2.5 mol% BiI3 doped Sb2S3 cell presented lower trap state energy level than the Sb2S3 cell; moreover, this doping amount effectively passivated the trap states. This codoping shows a similar trend even in the low bandgap Sb-2(SxSe1-x)(3) cell, resulting in 7.05% PCE under the standard illumination conditions (100 mW cm(-2)), which is one of the top efficiencies in solution processing Sb-2(SxSe1-x)(3) solar cells. Furthermore, the doped cells present higher humidity, thermal and photo stability. This study provides a new strategy for stable Pb-free solar cells.
URI
https://scholarworks.unist.ac.kr/handle/201301/49028
URL
https://onlinelibrary.wiley.com/doi/10.1002/advs.202002391
DOI
10.1002/advs.202002391
ISSN
2198-3844
Appears in Collections:
ECHE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU