Efficient All-Polymer Solar Cells Enabled by a Novel Medium Bandgap Guest Acceptor
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
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Detail(s)
Original language | English |
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Journal / Publication | Chinese Journal of Chemistry |
Volume | 42 |
Issue number | 24 |
Online published | 4 Nov 2024 |
Publication status | Published - 15 Dec 2024 |
Link(s)
Abstract
Near-infrared (NIR)-absorbing polymerized small molecule acceptors (PSMAs) based on a Y-series backbone (such as PY-IT) have been widely developed to fabricate efficient all-polymer solar cells (all-PSCs). However, medium-bandgap PSMAs are often overlooked, while they as the third component can be expected to boost power conversion efficiencies (PCEs) of all-PSCs, mainly due to their up-shifted lowest unoccupied molecular orbital (LUMO) energy level, complimentary absorption, and diverse intermolecular interaction compared to the NIR-absorbing host acceptor. Herein, an IDIC-series medium-bandgap PSMA (P-ITTC) is developed and introduced as the third component into D18/PY-IT host, which can not only form complementary absorption and cascade energy level, but also finely optimize active layer morphology. Therefore, compared to the D18/PY-IT based parental all-PSCs, the ternary all-PSCs based on D18/PY-IT:P-ITTC obtain an increased exciton dissociation, charge transport, carrier lifetime, as well as suppressed charge recombination and energy loss. As a result, the ternary all-PSCs achieve a high PCE of 17.64% with a photovoltage of 0.96 V, both of which are among the top values in layer-by-layer typed all-PSCs. This work provides a method for the design and selection of the medium-bandgap third component to fabricate efficient all-PSCs. © 2024 SIOC, CAS, Shanghai, & WILEY-VCH GmbH.
Research Area(s)
- All-polymer solar cells, Crystal engineering, Doping, Energy loss, Host-guest systems, Medium bandgap, Polymerized small molecule acceptor, Power conversion efficiency
Citation Format(s)
Efficient All-Polymer Solar Cells Enabled by a Novel Medium Bandgap Guest Acceptor. / Meng, Yongdie; Tang, Luting; Xiao, Manjun et al.
In: Chinese Journal of Chemistry, Vol. 42, No. 24, 15.12.2024.
In: Chinese Journal of Chemistry, Vol. 42, No. 24, 15.12.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review