High-Efficiency Colloidal Quantum Dot Photovoltaics via Robust Self-Assembled Monolayers
García de Arquer, F. Pelayo
Yoon, Yung Jin
Ip, Alexander H.
Kim, Jin Young
Sargent, Edward H.
KAUST Grant NumberKUS-11-009-21
MetadataShow full item record
Abstract© 2015 American Chemical Society. The optoelectronic tunability offered by colloidal quantum dots (CQDs) is attractive for photovoltaic applications but demands proper band alignment at electrodes for efficient charge extraction at minimal cost to voltage. With this goal in mind, self-assembled monolayers (SAMs) can be used to modify interface energy levels locally. However, to be effective SAMs must be made robust to treatment using the various solvents and ligands required for to fabricate high quality CQD solids. We report robust self-assembled monolayers (R-SAMs) that enable us to increase the efficiency of CQD photovoltaics. Only by developing a process for secure anchoring of aromatic SAMs, aided by deposition of the SAMs in a water-free deposition environment, were we able to provide an interface modification that was robust against the ensuing chemical treatments needed in the fabrication of CQD solids. The energy alignment at the rectifying interface was tailored by tuning the R-SAM for optimal alignment relative to the CQD quantum-confined electron energy levels. This resulted in a CQD PV record power conversion efficiency (PCE) of 10.7% with enhanced reproducibility relative to controls.
CitationKim G-H, García de Arquer FP, Yoon YJ, Lan X, Liu M, et al. (2015) High-Efficiency Colloidal Quantum Dot Photovoltaics via Robust Self-Assembled Monolayers. Nano Lett 15: 7691–7696. Available: http://dx.doi.org/10.1021/acs.nanolett.5b03677.
SponsorsThis publication is based in part on work supported by Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund - Research Excellence Program, by the Natural Sciences and Engineering Research Council (NSERC) of Canada, and by the International Cooperation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy (2012T100100740). We thank Emre Yassitepe and Cao-Thang Dinh for helpful discussions. We also thank E. Palmiano, L. Levina, A. Labelle, R. Wolowiec, and D. Kopilovic for their help over the course of this study.
PublisherAmerican Chemical Society (ACS)
CollectionsPublications Acknowledging KAUST Support
- Colloidal quantum dot photovoltaics: a path forward.
- Authors: Kramer IJ, Sargent EH
- Issue date: 2011 Nov 22
- Depleted-heterojunction colloidal quantum dot solar cells.
- Authors: Pattantyus-Abraham AG, Kramer IJ, Barkhouse AR, Wang X, Konstantatos G, Debnath R, Levina L, Raabe I, Nazeeruddin MK, Grätzel M, Sargent EH
- Issue date: 2010 Jun 22
- Conformal fabrication of colloidal quantum dot solids for optically enhanced photovoltaics.
- Authors: Labelle AJ, Thon SM, Kim JY, Lan X, Zhitomirsky D, Kemp KW, Sargent EH
- Issue date: 2015 May 26
- Colloidal quantum dot based solar cells: from materials to devices.
- Authors: Song JH, Jeong S
- Issue date: 2017
- Chloride Passivation of ZnO Electrodes Improves Charge Extraction in Colloidal Quantum Dot Photovoltaics.
- Authors: Choi J, Kim Y, Jo JW, Kim J, Sun B, Walters G, García de Arquer FP, Quintero-Bermudez R, Li Y, Tan CS, Quan LN, Kam APT, Hoogland S, Lu Z, Voznyy O, Sargent EH
- Issue date: 2017 Sep