Open Access
RSC Advances, volume 8, issue 27, pages 15149-15157
Towards understanding the initial performance improvement of PbS quantum dot solar cells upon short-term air exposure
Wenhui Gao
1, 2
,
Guangmei Zhai
1, 2, 3
,
Caifeng Zhang
1, 2
,
Zhimeng Shao
1, 2
,
Zheng Lulu
1, 2
,
Yong Zhang
1, 2, 4
,
Yongzhen Yang
1, 2
,
Xuemin Li
1, 2
,
Xuguang Liu
1, 2, 4
,
Bingshe Xu
1, 2
2
Collaborative Innovation Centre for Advanced Thin-film Optoelectronic Materials and Devices in Shanxi Province, Taiyuan, Shanxi 030024, China
|
Publication type: Journal Article
Publication date: 2018-04-20
Journal:
RSC Advances
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor: 3.9
ISSN: 20462069, 20462069
General Chemistry
General Chemical Engineering
Abstract
An initial improvement in performance of PbS quantum dot solar cells composed of one thick layer of PbS quantum dots (QDs) treated with tetrabutylammonium iodide (PbS-TBAI) and one thin layer of PbS QDs capped with 1,2-ethanedithiol (PbS-EDT) over short-term air exposure is widely observed. However, the underlying mechanisms still remain elusive. In the work, we sought to understand the mechanisms as well as their physicochemical origins using a combination of X-ray photoelectron spectroscopy (XPS) and various electronic measurements. It is found that the PbS-TBAI film plays a dominant role in the initial device performance improvement compared with the PbS-EDT film. The PbS-TBAI film is compensation doped upon short-term air exposure (one to three days) owing to the increase of Pb-O and/or Pb-OH species, enabling its energy band to align better with the electron transport layer for more efficient charge extraction. Moreover, it is demonstrated that the short-term air exposure is capable of reducing defects in the devices and improving the diode quality, resulting in an initial increase in device performance. This work contributes to the fundamental understanding of the surface chemistry changes of PbS quantum dots treated by different ligands over air-exposure and the role of surface chemistry of quantum dots in optimizing their photovoltaic performance.
Top-30
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1 publication, 4.35%
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1 publication, 4.35%
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1 publication, 4.35%
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1 publication, 4.35%
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1 publication, 4.35%
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1 publication, 4.35%
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Citations by publishers
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3
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5
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5 publications, 21.74%
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4 publications, 17.39%
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4 publications, 17.39%
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3 publications, 13.04%
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3 publications, 13.04%
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2 publications, 8.7%
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Gao W. et al. Towards understanding the initial performance improvement of PbS quantum dot solar cells upon short-term air exposure // RSC Advances. 2018. Vol. 8. No. 27. pp. 15149-15157.
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Gao W., Zhai G., Zhang C., Shao Z., Lulu Z., Zhang Y., Yang Y., Li X., Liu X., Xu B. Towards understanding the initial performance improvement of PbS quantum dot solar cells upon short-term air exposure // RSC Advances. 2018. Vol. 8. No. 27. pp. 15149-15157.
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TY - JOUR
DO - 10.1039/c8ra01422a
UR - https://doi.org/10.1039/c8ra01422a
TI - Towards understanding the initial performance improvement of PbS quantum dot solar cells upon short-term air exposure
T2 - RSC Advances
AU - Zhai, Guangmei
AU - Zhang, Caifeng
AU - Shao, Zhimeng
AU - Lulu, Zheng
AU - Yang, Yongzhen
AU - Li, Xuemin
AU - Liu, Xuguang
AU - Gao, Wenhui
AU - Zhang, Yong
AU - Xu, Bingshe
PY - 2018
DA - 2018/04/20 00:00:00
PB - Royal Society of Chemistry (RSC)
SP - 15149-15157
IS - 27
VL - 8
SN - 2046-2069
SN - 2046-2069
ER -
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@article{2018_Gao,
author = {Guangmei Zhai and Caifeng Zhang and Zhimeng Shao and Zheng Lulu and Yongzhen Yang and Xuemin Li and Xuguang Liu and Wenhui Gao and Yong Zhang and Bingshe Xu},
title = {Towards understanding the initial performance improvement of PbS quantum dot solar cells upon short-term air exposure},
journal = {RSC Advances},
year = {2018},
volume = {8},
publisher = {Royal Society of Chemistry (RSC)},
month = {apr},
url = {https://doi.org/10.1039/c8ra01422a},
number = {27},
pages = {15149--15157},
doi = {10.1039/c8ra01422a}
}
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Gao, Wenhui, et al. “Towards understanding the initial performance improvement of PbS quantum dot solar cells upon short-term air exposure.” RSC Advances, vol. 8, no. 27, Apr. 2018, pp. 15149-15157. https://doi.org/10.1039/c8ra01422a.
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