Abstract
A novel photoactive polymer with two different molecular weights is reported, based on a new building block: thieno[3,2-b][1]benzothiophene isoindigo. Due to the improved crystallinity, optimal blend morphology, and higher charge mobility, solar-cell devices of the high-molecular-weight polymer exhibit a superior performance, affording efficiencies of 9.1% without the need for additives, annealing, or additional extraction layers during device fabrication.
Original language | English (US) |
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Pages (from-to) | 4702-4707 |
Number of pages | 6 |
Journal | Advanced Materials |
Volume | 27 |
Issue number | 32 |
DOIs | |
State | Published - Aug 1 2015 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering
Keywords
- additive free
- annealing free
- molecular weight
- solar cells
- thieno[3,2-b][1]benzothiophene isoindigo