Issue 21, 2016
From the journal:

RSC Advances

PbSe quantum dot films with enhanced electron mobility employed in hybrid polymer/nanocrystal solar cells

Xiaoyu Zhang,ab   Yu Zhang,*a   Hua Wu,a   Long Yan,a   Zhenguang Wang,b   Jun Zhao,cd   William W. Yuacd  and  Andrey L. Rogach*b  

* Corresponding authors

a State Key Laboratory on Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
E-mail: yuzhang@jlu.edu.cn, andrey.rogach@cityu.edu.hk

b Department of Physics and Materials Science and Centre for Functional Photonics (CFP), City University of Hong Kong, Kowloon, Hong Kong SAR, China

c College of Material Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

d Department of Chemistry and Physics, Louisiana State University, Shreveport, LA 71115, USA

Abstract

We explore two strategies to improve the performance of hybrid solar cells fabricated using poly(3-hexylthiophene) (P3HT) and colloidal PbSe nanocrystals, which have reached a 1 sun power conversion efficiency of 2.9%. Using an atomic passivation strategy towards inorganic ligand-capped nanocrystals, the electron mobilities of PbSe quantum dot films are improved from 1.95 × 10−6 cm2 V−1 s−1 to 1.15 × 10−5 cm2 V−1 s−1. Employing ultrasmall PbSe nanocrystals allows us to adjust their bandgaps towards the type II heterojunction with P3HT, thus achieving efficient charge separation and transfer between the polymer/inorganic constituents. The device performance dropped to half after 10 days' storage, and the P3HT/PbSe interface was found to play a primary role in this efficiency degradation.

Graphical abstract: PbSe quantum dot films with enhanced electron mobility employed in hybrid polymer/nanocrystal solar cells

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Article information

DOI
https://doi.org/10.1039/C6RA01830K
Article type
Paper
Submitted
21 Jan 2016
Accepted
02 Feb 2016
First published
09 Feb 2016

RSC Adv., 2016,6, 17029-17035

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PbSe quantum dot films with enhanced electron mobility employed in hybrid polymer/nanocrystal solar cells

X. Zhang, Y. Zhang, H. Wu, L. Yan, Z. Wang, J. Zhao, W. W. Yu and A. L. Rogach, RSC Adv., 2016, 6, 17029 DOI: 10.1039/C6RA01830K

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