Wong, Joeson and Jariwala, Deep and Tagliabue, Giulia and Tat, Kevin and Davoyan, Artur R. and Sherrott, Michelle C. and Atwater, Harry A. (2017) High Photovoltaic Quantum Efficiency in Ultrathin van der Waals Heterostructures. ACS Nano, 11 (7). pp. 7230-7240. ISSN 1936-0851. doi:10.1021/acsnano.7b03148. https://resolver.caltech.edu/CaltechAUTHORS:20170612-090309097
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Abstract
We report experimental measurements for ultrathin (<15 nm) van der Waals heterostructures exhibiting external quantum efficiencies exceeding 50% and show that these structures can achieve experimental absorbance >90%. By coupling electromagnetic simulations and experimental measurements, we show that pn Wse_2/MoS_2 heterojunctions with vertical carrier collection can have internal photocarrier collection efficiencies exceeding 70%.
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| Additional Information: | © 2017 American Chemical Society. Received: May 6, 2017; Accepted: June 2, 2017; Publication Date (Web): June 7, 2017. This work is part of the “Light-Material Interactions in Energy Conversion” Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under award no. DE-SC0001293. D.J., A.R.D., and M.C.S. acknowledge additional support from the Space Solar Power project and the Resnick Sustainability Institute Graduate and Postdoctoral Fellowships. A.R.D. also acknowledges support in part from the Kavli Nanoscience Institute Postdoctoral Fellowship. G.T. acknowledges support in part from the Swiss National Science Foundation, Early Postdoc Mobility Fellowship no. P2EZP2_159101. J.W. acknowledges support from the National Science Foundation Graduate Research Fellowship under grant no. 1144469. K.T. would like to thank the Caltech SURF program and the Northrop Grumman Corporation for financial support. Author Contributions: These authors contributed equally. J.W. and D.J. prepared the samples and fabricated the devices. J.W. and A. R. D. performed the calculations. J.W., D.J., and G.T. performed the measurements. K.T. and M.C.S. assisted with sample preparation and fabrication. H.A.A. supervised over all the experiments, calculations, and data collection. The authors declare no competing financial interest. | ||||||||||||||||||
| Group: | Resnick Sustainability Institute, Kavli Nanoscience Institute, Space Solar Power Project | ||||||||||||||||||
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| Subject Keywords: | van der Waals, heterojunction, photovoltaics, quantum efficiency, high efficiency, MoS2, WSe2 | ||||||||||||||||||
| Issue or Number: | 7 | ||||||||||||||||||
| DOI: | 10.1021/acsnano.7b03148 | ||||||||||||||||||
| Record Number: | CaltechAUTHORS:20170612-090309097 | ||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170612-090309097 | ||||||||||||||||||
| Official Citation: | High Photovoltaic Quantum Efficiency in Ultrathin van der Waals Heterostructures Joeson Wong, Deep Jariwala, Giulia Tagliabue, Kevin Tat, Artur R. Davoyan, Michelle C. Sherrott, and Harry A. Atwater ACS Nano 2017 11 (7), 7230-7240 DOI: 10.1021/acsnano.7b03148 | ||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||
| ID Code: | 78091 | ||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||
| Deposited By: | Tony Diaz | ||||||||||||||||||
| Deposited On: | 12 Jun 2017 16:14 | ||||||||||||||||||
| Last Modified: | 15 Nov 2021 17:36 |
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