Quantum dot PbS(0.9)Se(0.1)/TiO2 heterojunction solar cells

Guangmei Zhai; Carena P Church; Alison J Breeze; Daoli Zhang; Glenn B Alers; Sue A Carter

doi:10.1088/0957-4484/23/40/405401

Quantum dot PbS(0.9)Se(0.1)/TiO2 heterojunction solar cells

Nanotechnology. 2012 Oct 12;23(40):405401. doi: 10.1088/0957-4484/23/40/405401. Epub 2012 Sep 20.

Authors

Guangmei Zhai¹, Carena P Church, Alison J Breeze, Daoli Zhang, Glenn B Alers, Sue A Carter

Affiliation

¹ Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.

PMID: 22997175
DOI: 10.1088/0957-4484/23/40/405401

Abstract

We report on photovoltaic cells based on ternary PbS(0.9)Se(0.1) quantum dots utilizing a heterojunction type device configuration. The best device shows an AM 1.5 power conversion efficiency of 4.25%. Furthermore, this ternary PbS(x)Se(1-x) quantum dot heterojunction device has a peak external quantum efficiency above 100% at 2.76 eV, approximately 2.7× the bandgap energy. The ternary quantum dots combine the higher short circuit currents of the binary PbSe system with the higher open circuit voltages of the binary PbS system.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.