Impact of donor halogenation on reorganization energies and voltage losses in bulk-heterojunction solar cells

Wu, Hongbo; Ma, Zaifei; Li, Mengyang; Lu, Hao; Tang, Ailing; Zhou, Erjun; Wen, Jin; Sun, Yanming; Tress, Wolfgang; Olsen, Jógvan Magnus Haugaard; Meloni, Simone; Bo, Zhishan; Tang, Zheng

doi:10.1039/D3EE00174A

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Impact of donor halogenation on reorganization energies and voltage losses in bulk-heterojunction solar cells
Authors:	Wu, Hongbo Ma, Zaifei Li, Mengyang Lu, Hao Tang, Ailing Zhou, Erjun Wen, Jin Sun, Yanming Tress, Wolfgang Olsen, Jógvan Magnus Haugaard Meloni, Simone Bo, Zhishan Tang, Zheng
et. al:	No
DOI:	10.1039/D3EE00174A
Published in:	Energy & Environmental Science
Volume(Issue):	16
Issue:	3
Page(s):	1277
Pages to:	1290
Issue Date:	2023
Publisher / Ed. Institution:	Royal Society of Chemistry
ISSN:	1754-5692 1754-5706
Language:	English
Subject (DDC):	621.3: Electrical, communications, control engineering
Abstract:	Donor halogenation is a common molecular design strategy used to reduce voltage losses (ΔVloss) and improve the power conversion efficiency (PCE) of bulk-heterojunction (BHJ) organic solar cells. Here, the impact of donor halogenation on the performance of organic donor–acceptor (DA) solar cells based on over 30 different materials systems is investigated, and the main reason for the improved performance of solar cells after donor halogenation is ascribed to the increased energy of the charge transfer (CT) state, and the reduced reorganization energy of the CT states (λCT). Also, the impact of donor halogenation on λCT is found to be stronger for the solar cells using the Y-series acceptors (Y5, Y6, etc.) than those using the non-Y-series acceptors (fullerene, ITIC, etc.), which is conducive to achieving lower ΔVloss in organic solar cells. Finally, the impact of donor halogenation on the solar cell performance is demonstrated to be dependent on the halogen substitution position, as well as the number of halogen atoms added to the donor molecule: Halogen substitution on the side groups of the donor molecule is found to be more effective than substitution at the backbone in reducing ΔVloss. These results suggest that future molecular design strategies focusing on the reduction of materials reorganization energy will be of great importance for further improving the performance of organic solar cells.
URI:	https://digitalcollection.zhaw.ch/handle/11475/27297
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Engineering
Organisational Unit:	Institute of Computational Physics (ICP)
Appears in collections:	Publikationen School of Engineering

Files in This Item:

There are no files associated with this item.

Show full item record

Wu, H., Ma, Z., Li, M., Lu, H., Tang, A., Zhou, E., Wen, J., Sun, Y., Tress, W., Olsen, J. M. H., Meloni, S., Bo, Z., & Tang, Z. (2023). Impact of donor halogenation on reorganization energies and voltage losses in bulk-heterojunction solar cells. Energy & Environmental Science, 16(3), 1277–1290. https://doi.org/10.1039/D3EE00174A

Wu, H. et al. (2023) ‘Impact of donor halogenation on reorganization energies and voltage losses in bulk-heterojunction solar cells’, Energy & Environmental Science, 16(3), pp. 1277–1290. Available at: https://doi.org/10.1039/D3EE00174A.

H. Wu et al., “Impact of donor halogenation on reorganization energies and voltage losses in bulk-heterojunction solar cells,” Energy & Environmental Science, vol. 16, no. 3, pp. 1277–1290, 2023, doi: 10.1039/D3EE00174A.

WU, Hongbo, Zaifei MA, Mengyang LI, Hao LU, Ailing TANG, Erjun ZHOU, Jin WEN, Yanming SUN, Wolfgang TRESS, Jógvan Magnus Haugaard OLSEN, Simone MELONI, Zhishan BO und Zheng TANG, 2023. Impact of donor halogenation on reorganization energies and voltage losses in bulk-heterojunction solar cells. Energy & Environmental Science. 2023. Bd. 16, Nr. 3, S. 1277–1290. DOI 10.1039/D3EE00174A

Wu, Hongbo, Zaifei Ma, Mengyang Li, Hao Lu, Ailing Tang, Erjun Zhou, Jin Wen, et al. 2023. “Impact of Donor Halogenation on Reorganization Energies and Voltage Losses in Bulk-Heterojunction Solar Cells.” Energy & Environmental Science 16 (3): 1277–90. https://doi.org/10.1039/D3EE00174A.

Wu, Hongbo, et al. “Impact of Donor Halogenation on Reorganization Energies and Voltage Losses in Bulk-Heterojunction Solar Cells.” Energy & Environmental Science, vol. 16, no. 3, 2023, pp. 1277–90, https://doi.org/10.1039/D3EE00174A.