Nature Materials, volume 16, issue 2, pages 258-263

Hybrid organic-inorganic inks flatten the energy landscape in colloidal quantum dot solids.

Mengxia Liu 1
Randy Sabatini 1
F Pelayo García De Arquer 1
Rahim Munir 2
Ahmed Hesham Balawi 2
Xinzheng Lan 1
Fengjia Fan 1
Grant Walters 1
Ahmad R Kirmani 2
Sjoerd Hoogland 1
Frédéric Laquai 2
Aram Amassian 2
Edward H Sargent 1
Publication typeJournal Article
Publication date2016-11-14
Journal: Nature Materials
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor41.2
ISSN14761122, 14764660
General Chemistry
Condensed Matter Physics
General Materials Science
Mechanical Engineering
Mechanics of Materials
Abstract
Bandtail states in disordered semiconductor materials result in losses in open-circuit voltage (Voc) and inhibit carrier transport in photovoltaics. For colloidal quantum dot (CQD) films that promise low-cost, large-area, air-stable photovoltaics, bandtails are determined by CQD synthetic polydispersity and inhomogeneous aggregation during the ligand-exchange process. Here we introduce a new method for the synthesis of solution-phase ligand-exchanged CQD inks that enable a flat energy landscape and an advantageously high packing density. In the solid state, these materials exhibit a sharper bandtail and reduced energy funnelling compared with the previous best CQD thin films for photovoltaics. Consequently, we demonstrate solar cells with higher Voc and more efficient charge injection into the electron acceptor, allowing the use of a closer-to-optimum bandgap to absorb more light. These enable the fabrication of CQD solar cells made via a solution-phase ligand exchange, with a certified power conversion efficiency of 11.28%. The devices are stable when stored in air, unencapsulated, for over 1,000 h.

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GOST Copy
Liu M. et al. Hybrid organic-inorganic inks flatten the energy landscape in colloidal quantum dot solids. // Nature Materials. 2016. Vol. 16. No. 2. pp. 258-263.
GOST all authors (up to 50) Copy
Liu M., Voznyy O., Sabatini R., García De Arquer F. P., Munir R., Balawi A. H., Lan X., Fan F., Walters G., Kirmani A. R., Hoogland S., Laquai F., Amassian A., Sargent E. H. Hybrid organic-inorganic inks flatten the energy landscape in colloidal quantum dot solids. // Nature Materials. 2016. Vol. 16. No. 2. pp. 258-263.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1038/nmat4800
UR - https://doi.org/10.1038/nmat4800
TI - Hybrid organic-inorganic inks flatten the energy landscape in colloidal quantum dot solids.
T2 - Nature Materials
AU - Liu, Mengxia
AU - Voznyy, Oleksandr
AU - Sabatini, Randy
AU - García De Arquer, F Pelayo
AU - Munir, Rahim
AU - Balawi, Ahmed Hesham
AU - Lan, Xinzheng
AU - Fan, Fengjia
AU - Walters, Grant
AU - Kirmani, Ahmad R
AU - Hoogland, Sjoerd
AU - Laquai, Frédéric
AU - Amassian, Aram
AU - Sargent, Edward H
PY - 2016
DA - 2016/11/14 00:00:00
PB - Springer Nature
SP - 258-263
IS - 2
VL - 16
SN - 1476-1122
SN - 1476-4660
ER -
BibTex |
Cite this
BibTex Copy
@article{2016_Liu,
author = {Mengxia Liu and Oleksandr Voznyy and Randy Sabatini and F Pelayo García De Arquer and Rahim Munir and Ahmed Hesham Balawi and Xinzheng Lan and Fengjia Fan and Grant Walters and Ahmad R Kirmani and Sjoerd Hoogland and Frédéric Laquai and Aram Amassian and Edward H Sargent},
title = {Hybrid organic-inorganic inks flatten the energy landscape in colloidal quantum dot solids.},
journal = {Nature Materials},
year = {2016},
volume = {16},
publisher = {Springer Nature},
month = {nov},
url = {https://doi.org/10.1038/nmat4800},
number = {2},
pages = {258--263},
doi = {10.1038/nmat4800}
}
MLA
Cite this
MLA Copy
Liu, Mengxia, et al. “Hybrid organic-inorganic inks flatten the energy landscape in colloidal quantum dot solids..” Nature Materials, vol. 16, no. 2, Nov. 2016, pp. 258-263. https://doi.org/10.1038/nmat4800.
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