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Identifying the Molecular Origins of High-Performance in Organic Photodetectors Based on Highly Intermixed Bulk Heterojunction Blends
- Source :
- ACS nano. 15(1)
- Publication Year :
- 2020
-
Abstract
- A bulk-heterojunction (BHJ) structure of organic semiconductor blend is widely used in photon-to-electron converting devices such as organic photodetectors (OPD) and photovoltaics (OPV). However, the impact of the molecular structure on the interfacial electronic states and optoelectronic properties of the constituent organic semiconductors is still unclear, limiting further development of these devices for commercialization. Herein, the critical role of donor molecular structure on OPD performance is identified in highly intermixed BHJ blends containing a small-molecule donor and C60 acceptor. Blending introduces a twisted structure in the donor molecule and a strong coupling between donor and acceptor molecules. This results in ultrafast exciton separation (
- Subjects :
- Electron mobility
Materials science
business.industry
Exciton
Binding energy
General Engineering
General Physics and Astronomy
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Acceptor
Polymer solar cell
0104 chemical sciences
Organic semiconductor
Chemical physics
Photovoltaics
Molecule
General Materials Science
0210 nano-technology
business
Subjects
Details
- ISSN :
- 1936086X
- Volume :
- 15
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- ACS nano
- Accession number :
- edsair.doi.dedup.....448ade0477b977fa8213b4a65465e40b