Pulsed laser deposition of Mn doped CdSe quantum dots for improved solar cell performance
- Department of Physics and Astronomy, University of Wyoming, Laramie, Wyoming 82071 (United States)
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071 (United States)
In this work, we demonstrate (1) a facile method to prepare Mn doped CdSe quantum dots (QDs) on Zn{sub 2}SnO{sub 4} 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 Zn{sub 2}SnO{sub 4} 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.
- OSTI ID:
- 22269208
- Journal Information:
- Applied Physics Letters, Vol. 104, Issue 18; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
Similar Records
Giant photocurrent enhancement by transition metal doping in quantum dot sensitized solar cells
Large enhancement in photocurrent by Mn doping in CdSe/ZTO quantum dot sensitized solar cells