Nanocrystalline TiO2 solar cells sensitized with InAs quantum dots.
We report nanocrystalline TiO2 solar cells sensitized with InAs quantum dots. InAs quantum dots of different sizes were synthesized and incorporated in solar cell devices. Efficient charge transfer from InAs quantum dots to TiO2 particles was achieved without deliberate modification of the quantum dot capping layer. A power conversion efficiency of about 1.7% under 5 mW/cm2 was achieved; this is relatively high for a nanocrystalline metal oxide solar cell sensitized with presynthesized quantum dots, but this efficiency could only be achieved at low light intensity. At one sun, the efficiency decreased to 0.3%. The devices are stable for at least weeks under room light in air.
Yu
Pingrong
P
Center for Basic Sciences, National Renewable Energy Laboratory, Golden, Colorado 80401, USA. pyu@innovalight.com
Zhu
Kai
K
Norman
Andrew G
AG
Ferrere
Suzanne
S
Frank
Arthur J
AJ
Nozik
Arthur J
AJ
D001152:Arsenicals / Q000138:chemical synthesis / Q000737:chemistry*; D003460:Crystallization; D007204:Indium / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D010777:Photochemistry; D045663:Quantum Dots; D012666:Semiconductors; D012680:Sensitivity and Specificity; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D001152:Arsenicals; D007204:Indium; C009495:titanium dioxide; D014025:Titanium; C076773:indium arsenide