TY - JOUR
T1 - Enhanced Electroluminescence from Organic Light-Emitting Diodes with an Organic–Inorganic Perovskite Host Layer
AU - Matsushima, Toshinori
AU - Qin, Chuanjiang
AU - Goushi, Kenichi
AU - Bencheikh, Fatima
AU - Komino, Takeshi
AU - Leyden, Matthew
AU - Sandanayaka, Atula S.D.
AU - Adachi, Chihaya
N1 - Funding Information:
This work was supported by the Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project, under JST ERATO Grant No. JPMJER1305, Japan, the International Institute for Carbon Neutral Energy Research (WPI-I2CNER) sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), JSPS KAKENHI, Grant Nos. JP15K14149 and JP16H04192, and the Canon Foundation.
Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/9/20
Y1 - 2018/9/20
N2 - The development of host materials with high performance is essential for fabrication of efficient and stable organic light-emitting diodes (OLEDs). Although host materials used in OLEDs are typically organics, in this study, it is shown that the organic–inorganic perovskite CH3NH3PbCl3 (MAPbCl3) can be used as a host layer for OLEDs. Vacuum-evaporated MAPbCl3 films have a wide band gap of about 3 eV and very high and relatively balanced hole and electron mobilities, which are suitable for the host material. Photoluminescence and electroluminescence take place through energy transfer from MAPbCl3 to an organic emitter in films. Incorporation of an MAPbCl3 host layer into OLEDs leads to a reduction of driving voltage and enhancement of external quantum efficiency as compared to devices with a conventional organic host layer. Additionally, OLEDs with an MAPbCl3 host layer demonstrate very good operational stability under continuous current operation. These results can be extensively applied to organic- and perovskite-based optoelectronics.
AB - The development of host materials with high performance is essential for fabrication of efficient and stable organic light-emitting diodes (OLEDs). Although host materials used in OLEDs are typically organics, in this study, it is shown that the organic–inorganic perovskite CH3NH3PbCl3 (MAPbCl3) can be used as a host layer for OLEDs. Vacuum-evaporated MAPbCl3 films have a wide band gap of about 3 eV and very high and relatively balanced hole and electron mobilities, which are suitable for the host material. Photoluminescence and electroluminescence take place through energy transfer from MAPbCl3 to an organic emitter in films. Incorporation of an MAPbCl3 host layer into OLEDs leads to a reduction of driving voltage and enhancement of external quantum efficiency as compared to devices with a conventional organic host layer. Additionally, OLEDs with an MAPbCl3 host layer demonstrate very good operational stability under continuous current operation. These results can be extensively applied to organic- and perovskite-based optoelectronics.
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U2 - 10.1002/adma.201802662
DO - 10.1002/adma.201802662
M3 - Article
C2 - 30091178
AN - SCOPUS:85052754218
SN - 0935-9648
VL - 30
JO - Advanced Materials
JF - Advanced Materials
IS - 38
M1 - 1802662
ER -