The device characteristics of a polymer light-emitting diode (PLED) based on a poly(p-phenylene vinylene) (PPV) derivative with an enhanced charge carrier mobility have been :investigated. Improvement of the mobility, which has been obtained by a decrease of the energetic disorder in the polymer, is expected to increase the power efficiency of a PLED. However, it is demonstrated that an increased mobility leads to a decrease as well as to a slower rise of the quantum efficiency with voltage. This performance reduction is explained in terms of an increased quenching of the electroluminescence (EL) at the cathode. (C) 2001 Elsevier Science B.V. All rights reserved.
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S China Normal Univ, Inst Optoelect Mat & Technol, Key Lab Electroluminescent Devices, Dept Educ, Guangzhou 510631, Guangdong, Peoples R ChinaS China Normal Univ, Inst Optoelect Mat & Technol, Key Lab Electroluminescent Devices, Dept Educ, Guangzhou 510631, Guangdong, Peoples R China
Niu, Qiaoli
Wang, Yongli
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S China Normal Univ, Inst Optoelect Mat & Technol, Key Lab Electroluminescent Devices, Dept Educ, Guangzhou 510631, Guangdong, Peoples R ChinaS China Normal Univ, Inst Optoelect Mat & Technol, Key Lab Electroluminescent Devices, Dept Educ, Guangzhou 510631, Guangdong, Peoples R China
Wang, Yongli
Zhang, Yong
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S China Normal Univ, Inst Optoelect Mat & Technol, Key Lab Electroluminescent Devices, Dept Educ, Guangzhou 510631, Guangdong, Peoples R ChinaS China Normal Univ, Inst Optoelect Mat & Technol, Key Lab Electroluminescent Devices, Dept Educ, Guangzhou 510631, Guangdong, Peoples R China
Zhang, Yong
Wang, Xin
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S China Normal Univ, Inst Optoelect Mat & Technol, Key Lab Electroluminescent Devices, Dept Educ, Guangzhou 510631, Guangdong, Peoples R ChinaS China Normal Univ, Inst Optoelect Mat & Technol, Key Lab Electroluminescent Devices, Dept Educ, Guangzhou 510631, Guangdong, Peoples R China
机构:
MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USAMIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
Xue, Jin
Zhao, Yuji
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAMIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
Zhao, Yuji
Oh, Sang-Ho
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USAMIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
Oh, Sang-Ho
Herrington, William F.
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MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USAMIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
Herrington, William F.
Speck, James S.
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Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USAMIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
Speck, James S.
DenBaars, Steven P.
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USAMIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
DenBaars, Steven P.
Nakamura, Shuji
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Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USAMIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
Nakamura, Shuji
Ram, Rajeev J.
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MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USAMIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA