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Open Access Nano Express

Modification of hybrid active bilayer for enhanced efficiency and stability in planar heterojunction colloidal quantum dot photovoltaics

Seung Jin Heo, Seokhyun Yoon, Sang Hoon Oh and Hyun Jae Kim*

Author Affiliations

School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea

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Nanoscale Research Letters 2013, 8:488  doi:10.1186/1556-276X-8-488

Published: 20 November 2013

Abstract

Solution-processed planar heterojunction colloidal quantum dot photovoltaics with a hybrid active bilayer is demonstrated. A power conversion efficiency of 1.24% under simulated air mass 1.5 illumination conditions is reported. This was achieved through solid-state treatment with cetyltrimethylammonium bromide of PbS colloidal quantum dot solid films. That treatment was used to passivate Br atomic ligands as well as to engineer the interface within the hybrid active bilayer.

Keywords:
Hybrid active bilayer; Colloidal PbS quantum dot photovoltaics; Planar structure; Ambient air stability