期刊
APPLIED PHYSICS LETTERS
卷 96, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3292183
关键词
dissociation; IV-VI semiconductors; lead compounds; nanoparticles; photoconductivity; photoemission; photovoltaic cells; solar cells; titanium compounds
资金
- DST [SR/NM/NS-55/2008, DST/TSG/PT/2008/46]
- CSIR [09/080(0613)/2008-EMR-I, 507076, 09/080(0505)/2006-EMR-I, 503974]
Photovoltaic devices based on PbS nanoparticles remained inactive in the near-IR region due to a not-so-favorable energy band-diagram that does not allow dissociation of excitons generated in PbS. In this work, with the introduction of TiO2 nanostructures in the PbS-based hybrid system, we show an enhancement of photovoltaic performance in both visible and near-IR regions. The addition of TiO2 increases the power conversion efficiency from 0.006% to 0.12%. With the aid of energy band-diagram, we show that excitons generated in PbS even in the near-IR range can now become dissociated to yield photocurrent in the external circuit.
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