A PbS nanocrystal-C60 photovoltaic device for infrared light harvesting
- 24 September 2007
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 91 (13) , 133506
- https://doi.org/10.1063/1.2790730
Abstract
PbSnanocrystal ( nc - Pb S ) - C 60 photovoltaic devices are demonstrated, in which nc-PbS function as electron donors, showing infrared photosensitivity up to 1600 nm . Annealing nc-PbS is proved to remove capping oleic acid ligands, studied using x-ray photoelectron spectroscopy, significantly improving the short circuit current, open circuit voltage, and fill factor. The device performance is rationalized by quantum confinement in nc-PbS and energy level alignment at the heterojunction based on direct measurements of nc-PbS ionization potential using ultraviolet photoelectron spectroscopy.This publication has 25 references indexed in Scilit:
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