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  • Title: Tuning the donor-acceptor strength of low-bandgap platinum-acetylide polymers for near-infrared photovoltaic applications.
    Author: Qin C, Fu Y, Chui CH, Kan CW, Xie Z, Wang L, Wong WY.
    Journal: Macromol Rapid Commun; 2011 Sep 15; 32(18):1472-7. PubMed ID: 21732466.
    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-c']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.
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