Journal
ACS MATERIALS LETTERS
Volume 3, Issue 7, Pages 947-955Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmaterialslett.1c00291
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [52073250]
- National 973 Program [2015CB932204]
Ask authors/readers for more resources
The study introduces a new organic semiconductor DOP-OMeDPA, which exhibits improved hole mobility and glass transition temperature compared to its oxa[5]helicene counterpart. A doped semiconducting composite based on DOP-OMeDPA shows high efficiency and thermal stability in perovskite solar cells.
Exotic organic semiconductors based on helicenes are attractive because of their peculiar topology-related optoelectronic properties and good solution-processability. We herein construct pyrrole-bridged bis(oxa[5]helicene) and further employ it as the pi-linker of a solution-processable molecular semiconductor (DOP-OMeDPA) with improved hole mobility and glass transition temperature compared with its oxa[5]helicene counterpart. A solution-processed, doped semiconducting composite of DOP-OMeDPA presents high conductivity and slow interfacial charge recombination in perovskite solar cells, enabling the fabrication of thermostable devices with 21.3% efficiency. The DOP-OMeDPA-based thin film exhibits excellent morphology stability at 60 degrees C and remarkably attenuates the thermal decomposition of perovskite. Molecular dynamics modeling uncovers the microscopic origin of glass transition, that is, the torsional vibration of electron-donor for pristine materials, compared with the translational motion of molecules in doped ones.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available