Journal article
(Original article)


Effective Ligand Engineering of the Cu2ZnSnS4 Nanocrystal Surface for Increasing Hole Transport Efficiency in Perovskite Solar Cells


Publication Details
Author(s): Khanzada LS, Levchuk I, Hou Y, Azimi SH, Osvet A, Ahmad R, Brandl M, Herre P, Distaso M, Hock R, Peukert W, Batentschuk M, Brabec C
Publication year: 2016
ISSN: 1616-3028
Language: English

Abstract

Effective engineering of surface ligands in semiconductor nanocrystals can facilitate the electronic interaction between the individual nanocrystals, making them promising for low-cost optoelectronic applications. Here, the use of high purity CuZnSnS (CZTS) nanocrystals as the photoactive layer and hole-transporting material is reported in low-temperature solution-processed solar cells. The high purity CZTS nanocrystals are prepared by engineering the surface ligands of CZTS nanocrystals, capped originally with the long-chain organic ligand oleylamine. After ligand removal, CZTS nanocrystals show substantial improvement in photoconductivity and mobility, displaying also an appreciable photoresponse in a simple heterojunction solar cell architecture. More notably, CZTS nanocrystals exhibit excellent hole-transporting properties as interface layer in perovskite solar cells, yielding power conversion efficiency (PCE) of 15.4% with excellent fill factor (FF) of 81%. These findings underscore the importance of removing undesired surface ligands in nanocrystalline optoelectronic devices, and demonstrate the great potential of CZTS nanocrystals as both active and passive material for the realization of low-cost efficient solar cells.



FAU Authors / FAU Editors


How to cite
APA: Khanzada, L.S., Levchuk, I., Hou, Y., Azimi, S.H., Osvet, A., Ahmad, R.,... Brabec, C. (2016). Effective Ligand Engineering of the Cu2ZnSnS4 Nanocrystal Surface for Increasing Hole Transport Efficiency in Perovskite Solar Cells. Advanced Functional Materials. https://dx.doi.org/10.1002/adfm.201603441

MLA: Khanzada, Laraib Sarfraz, et al. "Effective Ligand Engineering of the Cu2ZnSnS4 Nanocrystal Surface for Increasing Hole Transport Efficiency in Perovskite Solar Cells." Advanced Functional Materials (2016).

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