Premium
A Selenium‐Substituted Low‐Bandgap Polymer with Versatile Photovoltaic Applications
Author(s) -
Dou Letian,
Chang WeiHsuan,
Gao Jing,
Chen ChunChao,
You Jingbi,
Yang Yang
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201203827
Subject(s) - materials science , photovoltaic system , polymer , tandem , band gap , nanotechnology , selenium , solar cell , optoelectronics , engineering physics , electrical engineering , physics , metallurgy , composite material , engineering
A reduction of the bandgap and an enhancement of the charge transport properties of a LBG polymer (PBDTT‐DPP) can be achieved simultaneously by changing the sulfur atoms on the DPP unit to selenium atoms. The newly designed polymer, PBDTT‐SeDPP (Eg = 1.38 eV), shows excellent photovoltaic performance in single junction devices with power conversion efficiencies (PCEs) over 7% and photo‐response up to 900 nm. A tandem polymer solar cell and a visibly transparent solar cell based on PBDTT‐SeDPP show 9.5% and 4.5% PCEs, which are superior to those based on PBDTT‐DPP.