Effect of ZnO processing on the photovoltage of ZnO/poly(3-hexylthiophene) solar cells

Dana C. Olson, Yun Ju Lee, Matthew S. White, Nikos Kopidakis, Sean E. Shaheen, David S. Ginley, James A. Voigt, Julia W P Hsu

Research output: Contribution to journalArticlepeer-review

116 Citations (Scopus)

Abstract

Proper contact and band alignment across the heterojunction interface is critical to the performance of hybrid pi-conjugated polymer-nanostructured metal oxide photovoltaic devices. We investigated the effect of ZnO surface processing on ZnO/poly(3-hexylthiolphene) device performance. Devices in which the ZnO films/ nanorods were heated at 150°C in air exhibited an open circuit voltage ~200 mV higher than devices with ZnO treated by UV/ozone. We conclude that the differences observed in the two types of devices predominantly arise from changes in interfacial dipoles, and intermediate materials processing can be critical to solar cell performance.

Original languageEnglish
Pages (from-to)9544-9547
Number of pages4
JournalJournal of Physical Chemistry C
Volume112
Issue number26
DOIs
Publication statusPublished - 3 Jul 2008
Externally publishedYes

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