Premium
Organic light‐emitting transistors with voltage‐tunable lit area and full channel illumination
Author(s) -
Toffanin Stefano,
Capelli Raffaella,
Koopman Wouter,
Generali Gianluca,
Cavallini Susanna,
Stefani Andrea,
Saguatti Davide,
Ruani Giampiero,
Muccini Michele
Publication year - 2013
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201300066
Subject(s) - optoelectronics , transistor , common emitter , materials science , channel (broadcasting) , light emission , exciton , heterojunction , voltage , electrical engineering , physics , computer science , telecommunications , engineering , quantum mechanics
Organic light‐emitting transistors (OLETs) are multifunctional optoelectronic devices that hold great promise for a variety of applications, including flat panel displays, integrated light sources for sensing and optical communication systems. The narrow illumination area within the device channel is considered intrinsic to the device architecture and is a severe technological drawback for all those applications where a controlled, wide and homogeneous emission area is required. Here it is shown that not only the position but also the extension of the emission area is voltage‐tunable, and the entire channel of the transistor can be homogeneously illuminated. The modeling of the exciton distribution within the channel at the different bias conditions coupled to the modeling of the device emission profile highlights that excitons are spread through the entire channel width and across the bulk of the central emission layer of the p‐channel/emitter/n‐channel trilayer active heterostructure.