Near-IR activity of hybrid solar cells: Enhancement of efficiency by dissociating excitons generated in PbS nanoparticles

被引：31

作者：

Guchhait, Asim ^{[1
]}

Rath, Arup K. ^{[1
]}

Pal, Amlan J. ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Solid State Phys, Kolkata 700032, India

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 07期

关键词：

dissociation; IV-VI semiconductors; lead compounds; nanoparticles; photoconductivity; photoemission; photovoltaic cells; solar cells; titanium compounds; QUANTUM DOTS; PHOTOVOLTAICS;

D O I：

10.1063/1.3292183

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页数：3

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