Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/24627
Title: Tuning the donor-acceptor strength of low-bandgap platinum-acetylide polymers for near-infrared photovoltaic applications
Authors: Qin, C
Fu, Y
Chui, CH
Kan, CW 
Xie, Z
Wang, L
Wong, WY
Keywords: Metallopolymers
Near-infrared absorption
Platinum
Structure
Synthesis
Issue Date: 2011
Publisher: Wiley-VCH
Source: Macromolecular rapid communications, 2011, v. 32, no. 18, p. 1472-1477 How to cite?
Journal: Macromolecular rapid communications 
Abstract: Two near-infrared (NIR) absorbing metallopolyynes of platinum (P1 and P2) functionalized with a weakly electron-donating fluorene unit and two strong electron acceptors (viz. benzo[1,2-c:4,5-câ]bis([1,2,5]thiadiazole) and [1,2,5]thiadiazolo[3,4-i]dibenzo[a,c]phenazine) were synthesized and applied for NIR photovoltaic applications. With these designed weak donor-strong acceptor electronic traits, these metallopolymers possess narrow bandgaps of 1.54 and 1.65 eV and a low HOMO level of about 5.50 eV, thus inducing a power conversion efficiency up to 1% for bulk heterojunction solar cells at the NIR wavelength. Two low-bandgap polyplatinynes (P1 and P2) consisting of weakly electron-donating fluorene and strongly electron-withdrawing heteroquinoids are reported, which induce a significant charge-transfer in the polymer main chain. They have respective optical bandgaps of 1.54 and 1.65eV, with more favorable HOMO levels for near-infrared photo-to-electrical energy generation. Bulk heterojunction photovoltaic devices showing power conversion efficiency of up to 1% have been demonstrated.
URI: http://hdl.handle.net/10397/24627
ISSN: 1022-1336
DOI: 10.1002/marc.201100247
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