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

Firdaus, Y., He, Q., Lin, Y., Nugroho, F. A. A., Le Corre, V. M., Yengel, E., Balawi, A. H., Seitkhan, A., Laquai, F., Langhammer, C., Liu, F., Heeney, M. & Anthopoulos, T. D., 21-Jan-2020, In : Journal of Materials Chemistry A. 8, 3, p. 1164-1175 12 p.

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

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DOI

  • Yuliar Firdaus
  • Qiao He
  • Yuanbao Lin
  • Ferry Anggoro Ardy Nugroho
  • Vincent M. Le Corre
  • Emre Yengel
  • Ahmed H. Balawi
  • Akmaral Seitkhan
  • Frederic Laquai
  • Christoph Langhammer
  • Feng Liu
  • Martin Heeney
  • Thomas D. Anthopoulos

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.

Original languageEnglish
Pages (from-to)1164-1175
Number of pages12
JournalJournal of Materials Chemistry A
Volume8
Issue number3
Publication statusPublished - 21-Jan-2020
Event10th International Conference on Materials for Advanced Technologies (ICMAT) / Symposium P on Advanced Inorganic Materials and Thin Film Technology for Solar Energy Harvesting and Electronic Application - Singapore, Singapore
Duration: 23-Jun-201928-Jun-2019

Event

10th International Conference on Materials for Advanced Technologies (ICMAT) / Symposium P on Advanced Inorganic Materials and Thin Film Technology for Solar Energy Harvesting and Electronic Application

23/06/201928/06/2019

Singapore, Singapore

Event: Conference

    Keywords

  • OPEN-CIRCUIT VOLTAGE, ELECTRON-ACCEPTOR, RECOMBINATION, TRANSPORT

ID: 128609777