title: Highly reproducible planar Sb₂S₃-sensitized solar cells based on atomic layer deposition.
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 SnOv (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.
authors.affiliation: Energy Research Division, Daegu Gyeongbuk Institute of Science & Technology, 333, Techno jungang-daero, Hyeonpung-myeon, Dalseong-gun, Daegu 711-873, Republic of Korea. imromy@khu.ac.kr sjsung@dgist.ac.kr.
authors.forename: Dae-Hwan
authors.initials: DH
authors.lastname: Kim
authors.forename: Sang-Ju
authors.initials: SJ
authors.lastname: Lee
authors.forename: Mi Sun
authors.initials: MS
authors.lastname: Park
authors.forename: Jin-Kyu
authors.initials: JK
authors.lastname: Kang
authors.forename: Jin Hyuck
authors.initials: JH
authors.lastname: Heo
authors.forename: Sang Hyuk
authors.initials: SH
authors.lastname: Im
authors.forename: Shi-Joon
authors.initials: SJ
authors.lastname: Sung