Highly reproducible planar Sb2S3-sensitized solar cells based on atomic layer deposition

Dae-Hwan Kim; Sang-Ju Lee; Mi Sun Park; Jin-Kyu Kang; Jin Hyuck Heo; Sang Hyuk Im; Shi-Joon Sung

doi:10.1039/C4NR04148H

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Highly reproducible planar Sb₂S₃-sensitized solar cells based on atomic layer deposition†

Dae-Hwan Kim,‡^a Sang-Ju Lee,‡^a Mi Sun Park,^a Jin-Kyu Kang,^a Jin Hyuck Heo,^b Sang Hyuk Im*^b and Shi-Joon Sung

*^a

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* Corresponding authors

^a Energy Research Division, Daegu Gyeongbuk Institute of Science & Technology, 333, Techno jungang-daero, Hyeonpung-myeon, Dalseong-gun, Daegu 711-873, Republic of Korea
E-mail: imromy@khu.ac.kr, sjsung@dgist.ac.kr
Fax: (+82) 53-785-3739
Tel: (+82) 53-785-3700

^b Department of Chemical Engineering, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, Republic of Korea

Abstract

A high-quality Sb₂S₃ thin-absorber with controllable thickness was reproducibly formed by atomic layer deposition (ALD) technique. Compared with conventional chemical bath deposition (CBD), the Sb₂S₃ absorber deposited by ALD did not contain oxide or oxygen impurities and showed a very uniform thickness of Sb₂S₃ absorbers formed on a rough surface of dense blocking TiO₂/F-doped SnO₂ (bl-TiO₂/FTO) substrate. The planar ALD-Sb₂S₃ solar cells comprised of Au/Poly-3-hexylthiophene/ALD-Sb₂S₃/bl-TiO₂/FTO showed significantly improved power conversion efficiency of 5.77% at 1 sun condition and narrow efficiency deviation, whereas the planar CBD-Sb₂S₃ solar cells exhibited 2.17% power conversion efficiency. The high efficiency and good reproducibility of ALD-Sb₂S₃ solar cell devices is attributed to reduced backward recombination because of the inhibition of oxide defects within ALD-Sb₂S₃ absorber and the conformal deposition of very uniform Sb₂S₃ absorbers on the blocking TiO₂ surface by ALD process.

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Article information

DOI: https://doi.org/10.1039/C4NR04148H
Article type: Paper
Submitted: 22 Jul 2014
Accepted: 08 Oct 2014
First published: 09 Oct 2014
This article is Open Access

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Nanoscale, 2014,6, 14549-14554

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Highly reproducible planar Sb₂S₃-sensitized solar cells based on atomic layer deposition

D. Kim, S. Lee, M. S. Park, J. Kang, J. H. Heo, S. H. Im and S. Sung, Nanoscale, 2014, 6, 14549 DOI: 10.1039/C4NR04148H

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