›› 2015, Vol. 24 ›› Issue (2): 27801-027801.doi: 10.1088/1674-1056/24/2/027801

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Hole transporting material 5, 10, 15-tribenzyl-5H-diindolo[3, 2-a:3',2'-c]-carbazole for efficient optoelectronic applications as an active layer

郑燕琼a b, William J. Potscavage Jrb, 张建华a, 魏斌a, 黄荣娟a   

  1. a Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Shanghai 200072, China;
    b Center for Organic Photonics and Electronics Research (OPERA) and International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
  • 收稿日期:2014-07-09 修回日期:2014-08-01 出版日期:2015-02-05 发布日期:2015-02-05
  • 基金资助:
    Project supported by the Funding Program for World-Leading Innovative R & D on Science and Technology (FIRST) from JSPS, the Fund from the Science and Technology Commission of Shanghai Municipality, China (Grant Nos. 14DZ2280900 and 14XD1401800), and the Natural Science Foundation of Shanghai (Grant No. 15ZR1416600).

Hole transporting material 5, 10, 15-tribenzyl-5H-diindolo[3, 2-a:3',2'-c]-carbazole for efficient optoelectronic applications as an active layer

Zheng Yan-Qiong (郑燕琼)a b, William J. Potscavage Jrb, Zhang Jian-Hua (张建华)a, Wei Bin (魏斌)a, Huang Rong-Juan (黄荣娟)a   

  1. a Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Shanghai 200072, China;
    b Center for Organic Photonics and Electronics Research (OPERA) and International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
  • Received:2014-07-09 Revised:2014-08-01 Online:2015-02-05 Published:2015-02-05
  • Contact: Zhang Jian-Hua E-mail:jhzhang@shu.edu.cn
  • Supported by:
    Project supported by the Funding Program for World-Leading Innovative R & D on Science and Technology (FIRST) from JSPS, the Fund from the Science and Technology Commission of Shanghai Municipality, China (Grant Nos. 14DZ2280900 and 14XD1401800), and the Natural Science Foundation of Shanghai (Grant No. 15ZR1416600).

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摘要： In order to explore the novel application of the transparent hole-transporting material 5,10,15-tribenzyl-5H-diindolo[3,2-a:3',2'-c]-carbazole (TBDI), in this article TBDI is used as an active layer but not a buffer layer in a photodetector (PD), organic light-emitting diode (OLED), and organic photovoltaic cell (OPV) for the first time. Firstly, the absorption and emission spectra of a blend layer comprised of TBDI and electron-transporting material bis-(2-methyl-8-quinolinate) 4-phenylphenolate (BAlq) are investigated. Based on the absorption properties, an organic PD with a peak absorption at 320 nm is fabricated, and a relatively-high detectivity of 2.44×1011 cm·Hz1/2/W under 320-nm illumination is obtained. The TBDI/tris (8-hydroxyquinoline) aluminum (Alq3) OLED device exhibits a comparable external quantum efficiency and current efficiency to a traditional 4, 4-bis[N-(1-naphthyl)-N-phenyl-amino]biphenyl (α-NPD)/Alq3 OLED. A C70-based Schottky junction with 5 wt%-TBDI yields a power conversion efficiency of 5.0%, which is much higher than 1.7% for an α -NPD-based junction in the same configuration. These results suggest that TBDI has some promising properties which are in favor of the hole-transporting in Schottky junctions with a low-concentration donor.

关键词: 5, 10, 15-tribenzyl-5H-diindolo[3, 2-a:3', 2', -c]-carbazole, photodetector, organic light-emitting diode, Schottky junction

Abstract: In order to explore the novel application of the transparent hole-transporting material 5,10,15-tribenzyl-5H-diindolo[3,2-a:3',2'-c]-carbazole (TBDI), in this article TBDI is used as an active layer but not a buffer layer in a photodetector (PD), organic light-emitting diode (OLED), and organic photovoltaic cell (OPV) for the first time. Firstly, the absorption and emission spectra of a blend layer comprised of TBDI and electron-transporting material bis-(2-methyl-8-quinolinate) 4-phenylphenolate (BAlq) are investigated. Based on the absorption properties, an organic PD with a peak absorption at 320 nm is fabricated, and a relatively-high detectivity of 2.44×1011 cm·Hz1/2/W under 320-nm illumination is obtained. The TBDI/tris (8-hydroxyquinoline) aluminum (Alq3) OLED device exhibits a comparable external quantum efficiency and current efficiency to a traditional 4, 4-bis[N-(1-naphthyl)-N-phenyl-amino]biphenyl (α-NPD)/Alq3 OLED. A C70-based Schottky junction with 5 wt%-TBDI yields a power conversion efficiency of 5.0%, which is much higher than 1.7% for an α -NPD-based junction in the same configuration. These results suggest that TBDI has some promising properties which are in favor of the hole-transporting in Schottky junctions with a low-concentration donor.

Key words: 5,10,15-tribenzyl-5H-diindolo[3,2-a:3',2'-c]-carbazole, photodetector, organic light-emitting diode, Schottky junction

中图分类号:  (Optical properties of bulk materials and thin films)

  • 78.20.-e
68.35.-p (Solid surfaces and solid-solid interfaces: structure and energetics) 73.40.Lq (Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions) 42.79.Ek (Solar collectors and concentrators)