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Pulsed laser deposition of Mn doped CdSe quantum dots for improved solar cell performance

journal contribution
posted on 05.05.2014, 00:00 by Qilin Dai, E. M. Sabio, Wenyong Wang, Jinke Tang
In this work, we demonstrate (1) a facile method to prepare Mn doped CdSe quantum dots (QDs) on Zn2SnO4 photoanodes by pulsed laser deposition and (2) improved device performance of quantum dot sensitized solar cells of the Mn doped QDs (CdSe:Mn) compared to the undoped QDs (CdSe). The band diagram of photoanode Zn2SnO4 and sensitizer CdSe:Mn QD is proposed based on the incident-photon-to-electron conversion efficiency (IPCE) data. Mn-modified band structure leads to absorption at longer wavelengths than the undoped CdSe QDs, which is due to the exchange splitting of the CdSe:Mn conduction band by the Mn dopant. Three-fold increase in the IPCE efficiency has also been observed for the Mn doped samples.

History

ISO

eng

Language

English

Publisher

University of Wyoming. Libraries

Journal title

APPLIED PHYSICS LETTERS

Collection

Faculty Publications - Physics and Astronomy

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Faculty Publications - Physics and Astronomy

Licence

Exports