Novel wide-bandgap non-fullerene acceptors for efficient tandem organic solar cells

Firdaus Y, He Q, Lin Y, Nugroho FAA, Le Corre VM, Yengel E, Balawi AH, Seitkhan A, Laquai F, Langhammer C, Liu F, Heeney M, Anthopoulos TD (2020)

Publication Status: Published

Publication Type: Journal article

Publication year: 2020

Journal

Journal of Materials Chemistry A Royal Society of Chemistry

Publisher: ROYAL SOC CHEMISTRY

Book Volume: 8

Pages Range: 1164-1175

Journal Issue: 3

DOI: 10.1039/c9ta11752k

Abstract

The power conversion efficiency (PCE) of tandem organic photovoltaics (OPVs) is currently limited by the lack of suitable wide-bandgap materials for the front-cell. Here, two new acceptor molecules, namely IDTA and IDTTA, with optical bandgaps (Eoptg) of 1.90 and 1.75 eV, respectively, are synthesized and studied for application in OPVs. When PBDB-T is used as the donor polymer, single-junction cells with PCE of 7.4%, for IDTA, and 10.8%, for IDTTA, are demonstrated. The latter value is the highest PCE reported to date for wide-bandgap (Eoptg >= 1.7 eV) bulk-heterojunction OPV cells. The higher carrier mobility in IDTTA-based cells leads to improved charge extraction and higher fill-factor than IDTA-based devices. Moreover, IDTTA-based OPVs show significantly improved shelf-lifetime and thermal stability, both critical for any practical applications. With the aid of optical-electrical device modelling, we combined PBDB-T:IDTTA, as the front-cell, with PTB7-Th:IEICO-4F, as the back-cell, to realize tandem OPVs with open circuit voltage of 1.66 V, short circuit current of 13.6 mA cm(-2) and a PCE of 15%; in excellent agreement with our theoretical predictions. The work highlights IDTTA as a promising wide-bandgap acceptor for high-performance tandem OPVs.

Authors with CRIS profile

Vincent Marc Le Corre Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

King Abdullah University of Science and Technology (KAUST) / جامعة الملك عبد الله للعلوم و التقنية SA Saudi Arabia (SA)

How to cite

APA:

Firdaus, Y., He, Q., Lin, Y., Nugroho, F.A.A., Le Corre, V.M., Yengel, E.,... Anthopoulos, T.D. (2020). Novel wide-bandgap non-fullerene acceptors for efficient tandem organic solar cells. Journal of Materials Chemistry A, 8(3), 1164-1175. https://dx.doi.org/10.1039/c9ta11752k

MLA:

Firdaus, Yuliar, et al. "Novel wide-bandgap non-fullerene acceptors for efficient tandem organic solar cells." Journal of Materials Chemistry A 8.3 (2020): 1164-1175.

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