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- Title
Rigorous Characterization and Predictive Modeling of Hole Transport in Amorphous Organic Semiconductors.
- Authors
Kotadiya, Naresh B.; Mondal, Anirban; Shiyun Xiong; Blom, Paul W. M.; Andrienko, Denis; Wetzelaer, Gert-Jan A. H.
- Abstract
Amorphous small-molecule hole-transporting materials are commonly used in organic light-emitting diodes and perovskite solar cells. Characterization of their main functionality, hole transport, has been complicated by the presence of large contact barriers. Using a recently developed technique to establish Ohmic hole contacts, the bulk hole transport in a series of molecules with a broad range of ionization energies is investigated. The measured chargecarrier mobility dependence on charge concentration, electric field, and temperature is used to extract the energetic disorder and molecular site spacing. Excellent agreement of these parameters as well as ionization energies with multiscale simulations paves the way to predictive charge-transport simulations from the molecular level.
- Subjects
SEMICONDUCTORS; AMORPHOUS substances; ELECTRIC fields; RESISTANCE heating; IONIZATION energy
- Publication
Advanced Electronic Materials, 2018, Vol 4, Issue 12, p1
- ISSN
2199-160X
- Publication type
Article
- DOI
10.1002/aelm.201800366