Portal de Periódicos da CAPES

Highly Efficient Bilayer Interface Exciplex For Yellow Organic Light-Emitting Diode

2013; American Chemical Society; Volume: 5; Issue: 15 Linguagem: Inglês

10.1021/am402032z

1944-8252

Wen‐Yi Hung, Guan-Cheng Fang, Yuh‐Chia Chang, Ting-Yi Kuo, Pi‐Tai Chou, Shih-Wei Lin, Ken‐Tsung Wong,

Conducting polymers and applications

A simple three-layer interfacial-type yellow emission exciplex device with an external quantum efficiency as high as 7.7% has been successfully achieved by combining conformation compatible C3-symmetric hole-transporting TCTA and electron-transporting 3P-T2T. The excellent and balanced charge-transporting properties of TCTA and 3P-T2T and the large energy-levels offset (0.8 eV) of TCTA/3P-T2T interface play important roles for the efficient exciplexes formation, which are effectively confined around the interfacial region due to the high triplet energies (2.85 eV) of TCTA and 3P-T2T. The high-performance OLED was believed to be from the effective harvest of exciplex triplet excitons via reverse intersystem crossing process.