Improving Structural Order for a High‐Performance Diketopyrrolopyrrole‐Based Polymer Solar Cell with a Thick Active Layer
Abstract
A series of low‐bandgap polymers based on thienyl benzodithiophene (BDTT) and furan‐substituted diketopyrrolopyrrole (FDPP) units with different side chains are presented. By replacing the branched ethylhexyl group on the FDPP unit with linear side chains, the structural order and carrier mobility of the modified polymers are enhanced accordingly. The power conversion efficiencies (PCE) of single‐junction devices based on polymers of this series are improved from ≈5% to ≈7%. More importantly, devices made from the modified polymers show excellent photovoltaic performance with a thick active layer of up to 360 nm, a very promising characteristic for the industrial implementation of polymer solar cell devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 18, 2013
- Source ID
- 10.1002/aenm.201300739
Entities
People
- Brion Bob
- Cheng Wang
- Chun‐chao Chen
- Gang Li
- Jing Gao
- Jingbi You
- Joseph W Strzalka
- Letian Dou
- Wei Chen
- Wei‐hsuan Chang
- Xuanrong Guo
- Yang Yang
Organizations
- Argonne National Laboratory
- Lawrence Berkeley National Laboratory
- National Science Foundation
- Office of Naval Research
- UCLA Henry Samueli School of Engineering and Applied Science
- University of California, Los Angeles
- University of Chicago