Highly Asymmetric n(+)-p Heterojunction Quantum-Dot Solar Cells with Significantly Improved Charge-Collection Efficiencies

Min-Jae Choi; Sunchuel Kim; Hunhee Lim; Jaesuk Choi; Dong Min Sim; Soonmin Yim; Byung Tae Ahn; Jin Young Kim; Yeon Sik Jung

doi:10.1002/adma.201503879

Highly Asymmetric n(+)-p Heterojunction Quantum-Dot Solar Cells with Significantly Improved Charge-Collection Efficiencies

Adv Mater. 2016 Mar 2;28(9):1780-7. doi: 10.1002/adma.201503879. Epub 2015 Dec 21.

Authors

Min-Jae Choi¹, Sunchuel Kim¹, Hunhee Lim¹, Jaesuk Choi¹, Dong Min Sim¹, Soonmin Yim¹, Byung Tae Ahn¹, Jin Young Kim², Yeon Sik Jung¹

Affiliations

¹ Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-guDaejeon, 305-701, Republic of Korea.
² Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul, 136-791, Republic of Korea.

PMID: 26689133
DOI: 10.1002/adma.201503879

Abstract

The depletion region width of metal-oxide/quantum-dot (QD) heterojunction solar cells is increased by a new method in which heavily boron-doped n(+)-ZnO is employed. It is effectively increased in the QD layer by 30% compared to the counterpart with conventional n-ZnO, and provides 41% and 37% improvement of J(sc) (16.7 mA cm(-2) to 23.5 mA cm(-2) ) and power conversion efficiency (5.52% to 7.55%), respectively.

Keywords: colloidal quantum dots; depletion region width; heavily doping; metal oxides; solar cells.