Hole-conducting mediator for stable Sb2S3-sensitized photoelectrochemical solar cells

Choong-Sun Lim; Sang Hyuk Im; Jae Hui Rhee; Yong Hui Lee; Hi-Jung Kim; Nilkamal Maiti; Yongku Kang; Jeong Ah Chang; Md. K. Nazeeruddin; Michael Grätzel; Sang Il Seok

doi:10.1039/C1JM14584C

Hole-conducting mediator for stable Sb₂S₃-sensitized photoelectrochemical solar cells

Choong-Sun Lim,†^a Sang Hyuk Im,†^a Jae Hui Rhee,†^a Yong Hui Lee,^a Hi-Jung Kim,^a Nilkamal Maiti,^a Yongku Kang,^a Jeong Ah Chang,^a Md. K. Nazeeruddin,^b Michael Grätzel^b and Sang Il Seok*^a

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* Corresponding authors

^a KRICT-EPFL Global Research Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon, Republic of Korea
E-mail: seoksi@krict.re.kr
Fax: +82-42-861-4151
Tel: +82-42-860-7314

^b Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Science, Swiss Federal Institute of Technology, Lausanne, Switzerland

Abstract

Iodide redox (3I⁻/I₃⁻), polysulfide redox (S²⁻/S_x²⁻), organic redox [TMTU/TMFDS²⁺: tetramethylthiourea/tetramethylformaminium-bis(trifluoromethanesulfonyl)imide], ferrocene redox (Fc/Fc⁺), nickel redox [Ni(II)/Ni(III)], and cobalt redox [Co(II)/Co(III)] hole conducting electrolytes were systematically investigated to determine their suitability for use in Sb₂S₃-sensitized photoelectrochemical solar cells. A long-term stability test and UV-visible spectral analyses revealed that Sb₂S₃-sensitized photoelectrochemical solar cells worked stably with Co(II)(o-phen)₃(TFSI)₂/Co(III)(o-phen)₃(TFSI)₃ [TFSI: bis(trifluoromethanesulfonyl)imide] as the redox mediator.

Journal of Materials Chemistry

Hole-conducting mediator for stable Sb₂S₃-sensitized photoelectrochemical solar cells

Abstract

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Hole-conducting mediator for stable Sb₂S₃-sensitized photoelectrochemical solar cells

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