Organic Photodetectors Using Triplet Materials Doped in Polyalkylfluorene

• HAMASAKI Tatsunari

  Center for Advanced Science and Innovation, Osaka University

• MORIMUNE Taichiro

  Takuma National College of Technology

• KAJII Hirotake

  Center for Advanced Science and Innovation, Osaka University

• OHMORI Yutaka

  Center for Advanced Science and Innovation, Osaka University

抄録

The characteristics of violet-sensitive organic photodetectors (OPDs) utilizing polyalkylfluorene and triplet materials have been studied as a host and a dopant material, respectively. For the photo absorption layer, poly(9, 9-dioctylfluorene) [PFO] and a phosphorescent iridium complex (Iridium (III) bis(2-(4, 6-difluorophenyl)pyridinato-N, C²) [FIrpic] or Iridium (III) bis(2-(2'-benzothienyl)pyridinato-N, C³')(acetyl-acetonate) [(btp)₂Ir(acac)]) were used as a host and a dopant material, respectively. PFO: (btp)₂Ir(acac) device showed less photocurrent than PFO device because (btp)₂Ir(acac) enhances recombination of the photo generated carriers in the photo absorption layer. On the other hand, PFO : FIrpic device showed larger photocurrent than PFO device due to triplet energy transfer from FIrpic to PFO. A cutoff frequency of 20MHz was observed using a sinusoidal modulated violet laser light illumination under the reverse bias of 8V.

収録刊行物

• IEICE Transactions on Electronics

  IEICE Transactions on Electronics E91-C (12), 1859-1862, 2008

  一般社団法人 電子情報通信学会

キーワード

• organic photodetectors
• solution process
• polymer material
• phosphorescent material

詳細情報

• CRID: 1390282679351163136
• NII論文ID: 10026820331
• NII書誌ID: AA10826283
• DOI: 10.1093/ietele/e91-c.12.1859
• ISSN: 17451353
• ISSN: 09168524
• Web Site: https://www.jstage.jst.go.jp/article/transele/E91.C/12/E91.C_12_1859/_pdf
• 本文言語コード: en
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