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Enhancement of Perovskite-Based Solar Cells Employing Core–Shell Metal Nanoparticles

Zhang, Wei, Saliba, Michael, Stranks, Samuel D., Sun, Yao, Shi, Xian, Wiesner, Ulrich and Snaith, Henry J. (2013) Enhancement of Perovskite-Based Solar Cells Employing Core–Shell Metal Nanoparticles Nano Letters, 13 (9). pp. 4505-4510.

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Recently, inorganic and hybrid light absorbers such as quantum dots and organometal halide perovskites have been studied and applied in fabricating thin-film photovoltaic devices because of their low-cost and potential for high efficiency. Further boosting the performance of solution processed thin-film solar cells without detrimentally increasing the complexity of the device architecture is critically important for commercialization. Here, we demonstrate photocurrent and efficiency enhancement in meso-superstructured organometal halide perovskite solar cells incorporating core–shell Au@SiO2 nanoparticles (NPs) delivering a device efficiency of up to 11.4%. We attribute the origin of enhanced photocurrent to a previously unobserved and unexpected mechanism of reduced exciton binding energy with the incorporation of the metal nanoparticles, rather than enhanced light absorption. Our findings represent a new aspect and lever for the application of metal nanoparticles in photovoltaics and could lead to facile tuning of exciton binding energies in perovskite semiconductors.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Saliba, Michael
Stranks, Samuel D.
Sun, Yao
Shi, Xian
Wiesner, Ulrich
Snaith, Henry J.
Date : 11 September 2013
DOI : 10.1021/nl4024287
Copyright Disclaimer : Copyright © 2013 American Chemical Society
Uncontrolled Keywords : Au@SiO2 nanoparticles; Exciton binding energy; Free charge Carriers; Perovskites; Thin-film solar cells
Depositing User : Clive Harris
Date Deposited : 01 Jun 2017 09:33
Last Modified : 06 Jul 2019 05:23

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