Charge generation dynamics in polymer nonfullerene solar cells with low energy loss

Robert Younts; Evgeny O. Danilov; Kenan Gundogdu; Bhoj Raj Gautam

doi:10.1117/1.JPE.8.032209

24 April 2018 Charge generation dynamics in polymer nonfullerene solar cells with low energy loss

Robert Younts, Evgeny O. Danilov, Kenan Gundogdu, Bhoj Raj Gautam

Author Affiliations +

Funded by: Office of Naval Research

Journal of Photonics for Energy, Vol. 8, Issue 3, 032209 (April 2018). https://doi.org/10.1117/1.JPE.8.032209

Abstract

Polymer nonfullerene solar cells are emerging as an alternative of polymer fullerene solar cells. However, maximizing the short-circuit density and open-circuit voltage is a critical issue in these solar cells. Here, using ultrafast spectroscopy, we measured exciton relaxation and charge separation dynamics in polymer nonfullerene blend with low driving force. Our study indicates high polaron yield despite the energy loss of as low as 0.59 eV. This suggests that the small driving force has minimum detrimental effect in realizing high performance in polymer nonfullerene solar cells.

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Robert Younts, Evgeny O. Danilov, Kenan Gundogdu, and Bhoj Raj Gautam "Charge generation dynamics in polymer nonfullerene solar cells with low energy loss," Journal of Photonics for Energy 8(3), 032209 (24 April 2018). https://doi.org/10.1117/1.JPE.8.032209

Received: 31 January 2018; Accepted: 3 April 2018; Published: 24 April 2018

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