Guchhait, Asim ; Rath, Arup K. ; Pal, Amlan J. (2010) Near-IR activity of hybrid solar cells: enhancement of efficiency by dissociating excitons generated in PbS nanoparticles Applied Physics Letters, 96 (7). 073505. ISSN 0003-6951
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Official URL: http://apl.aip.org/resource/1/applab/v96/i7/p07350...
Related URL: http://dx.doi.org/10.1063/1.3292183
Abstract
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | Dissociation; II-VI Semiconductors; Lead Compounds; Nanoparticles; Photoconductivity; Photoemission; Photovoltaic Cells; Solar Cells; Titanium Compounds |
| ID Code: | 65754 |
| Deposited On: | 18 Oct 2011 09:10 |
| Last Modified: | 18 Oct 2011 09:10 |
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