http://dx.doi.org/10.1002/marc.201100247">
 

Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Tuning the donor-acceptor strength of low-bandgap platinum-acetylide polymers for near-infrared photovoltaic applications

Language

English

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. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

metallopolymers, near-infrared absorption, platinum, structure, synthesis

Publication Date

2011

Source Publication Title

Macromolecular Rapid Communications

Volume

32

Issue

18

Start Page

1472

End Page

1477

Publisher

Wiley-VCH Verlag

ISSN (print)

10221336

ISSN (electronic)

15213927

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