Abstract
A p -type doped organic layer combined with a hole-blocking layer has been experimentally demonstrated to serve as the charge generation unit in tandem-type organic light-emitting devices. The p -type layer functions as the source of both holes and electrons. Charge separation is explained by the tunneling model that the hole-blocking layer reduces the energy barrier for the electrons generated in the p -type layer to tunnel through into one light-emitting unit, while the holes generated in the p -type layer can transport to the other light-emitting unit easily under operation voltage.
Original language | English (US) |
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Article number | 083304 |
Journal | Applied Physics Letters |
Volume | 93 |
Issue number | 8 |
DOIs | |
State | Published - 2008 |
Bibliographical note
Funding Information:This work was supported by NSFC, MOST (973 project), and CAS Program for visiting Ph.D. students from universities in China.