An energy-harvesting scheme employing CuGaSe 2 quantum dot-modified ZnO buffer layers for drastic conversion efficiency enhancement in inorganic-organic hybrid solar cells

Cherng Rong Ho, Meng Lin Tsai, Hung Jun Jhuo, Der Hsien Lien, Chin An Lin, Shin Hung Tsai, Tzu Chiao Wei, Kun Ping Huang, Show An Chen, Jr-Hau He*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We demonstrated a promising route to enhance the performance of inverted organic photovoltaic (OPV) devices by the incorporation of CuGaSe 2 (CGS) quantum dots (QDs) into the ZnO buffer layer of P3HT:PCBM-based devices. The modification of QDs provides better band alignment between the organic/cathode interface, improves ZnO crystal quality, and increases photon absorption, leading to more effective carrier transport/collection. By employing this energy-harvesting scheme, short-circuit current density, open-circuit voltage, and fill factor of the OPV device after CGS QD modification are improved by 9.43%, 7.02% and 6.31%, respectively, giving rise to a 23.8% enhancement in the power conversion efficiency.

Original languageEnglish (US)
Pages (from-to)6350-6355
Number of pages6
JournalNanoscale
Volume5
Issue number14
DOIs
StatePublished - Jul 21 2013

ASJC Scopus subject areas

  • Materials Science(all)

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