Efficient Inorganic‐Organic Heterojunction Solar Cells Employing Sb<sub>2</sub>(S<sub><i>x</i></sub>/Se<sub>1‐<i>x</i></sub>)<sub>3</sub> Graded‐Composition Sensitizers

Yong Chan Choi(Institute of Chemical Technology), Yong Hui Lee(Institute of Chemical Technology), Sang Hyuk Im(Kyung Hee University), Jun Hong Noh(Institute of Chemical Technology), Tarak Nath Mandal(Korea Research Institute of Chemical Technology), Woon Seok Yang(Korea Research Institute of Chemical Technology), Sang Il Seok(Institute of Chemical Technology)
Advanced Energy Materials
January 16, 2014
Cited by 137

Abstract

A Sb2(S1-x/Sex)3 graded-composition is obtained by a sequential deposition of Sb2S3 and Sb2Se3 onto a mesoporous TiO2 photoelectrode followed by thermal annealing at 300 °C. The compositional graded-solar cells exhibit a greatly enhanced performance compared to pristine Sb2S3-sensitized or Sb2Se3-sensitized solar cells. The best performing cell, delivering an incident-photon-to-current efficiency extended to 1050 nm, exhibits an overall power conversion efficiency of 6.6% under simulated illumination.


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