Efficiency of a blue organic light-emitting diode enhanced by inserting charge control layers into the emission region

We demonstrate high current efficiency of a blue fluorescent organic light-emitting diode （OLED） by using the charge control layers （CCLs） based on Alq3 . The CCLs that are inserted into the emitting layers （EMLs） could impede the hole injection and facilitate the electron transport, which can impro...

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Published inChinese physics B Vol. 22; no. 4; pp. 504 - 507
Main Author 白娟娟 吴晓明 华玉林 穆雪 毕文涛 苏跃举 焦志强 申利莹 印寿根 郑加金
Format Journal Article
LanguageEnglish
Published 01.04.2013
Subjects
Alq3
Carriers
Cationic
Charge
Devices
Electron transport
Fluorescence
Luminance
Organic light emitting diodes
发射区
控制层
有机发光二极管
电流效率
电荷
绿色发光材料
蓝色荧光
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Abstract We demonstrate high current efficiency of a blue fluorescent organic light-emitting diode （OLED） by using the charge control layers （CCLs） based on Alq3 . The CCLs that are inserted into the emitting layers （EMLs） could impede the hole injection and facilitate the electron transport, which can improve the carrier balance and further expand the exciton generation region. The maximal current efficiency of the optimal device is 5.89 cd/A at 1.81 mA/cm2 , which is about 2.19 times higher than that of the control device （CD） without the CCL, and the maximal luminance is 19.660 cd/m2 at 12V. The device shows a good color stability though the green light emitting material Alq3 is introduced as the CCL in the EML, but it has a poor lifetime due to the formation of cationic Alq3 species.
AbstractList We demonstrate high current efficiency of a blue fluorescent organic light-emitting diode (OLED) by using the charge control layers (CCLs) based on Alq sub(3). The CCLs that are inserted into the emitting layers (EMLs) could impede the hole injection and facilitate the electron transport, which can improve the carrier balance and further expand the exciton generation region. The maximal current efficiency of the optimal device is 5.89 cd/A at 1.81 mA/cm super(2), which is about 2.19 times higher than that of the control device (CD) without the CCL, and the maximal luminance is 19.660 cd/m super(2) at 12 V. The device shows a good color stability though the green light emitting material Alq sub(3) is introduced as the CCL in the EML, but it has a poor lifetime due to the formation of cationic Alq sub(3) species.
We demonstrate high current efficiency of a blue fluorescent organic light-emitting diode （OLED） by using the charge control layers （CCLs） based on Alq3 . The CCLs that are inserted into the emitting layers （EMLs） could impede the hole injection and facilitate the electron transport, which can improve the carrier balance and further expand the exciton generation region. The maximal current efficiency of the optimal device is 5.89 cd/A at 1.81 mA/cm2 , which is about 2.19 times higher than that of the control device （CD） without the CCL, and the maximal luminance is 19.660 cd/m2 at 12V. The device shows a good color stability though the green light emitting material Alq3 is introduced as the CCL in the EML, but it has a poor lifetime due to the formation of cationic Alq3 species.
Author 白娟娟 吴晓明 华玉林 穆雪 毕文涛 苏跃举 焦志强 申利莹 印寿根 郑加金
AuthorAffiliation Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin Key Laboratory of Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China College of Optoelectronics Engineenng, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
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Notes organic light-emitting devices; charge control layer; current efficiency
We demonstrate high current efficiency of a blue fluorescent organic light-emitting diode （OLED） by using the charge control layers （CCLs） based on Alq3 . The CCLs that are inserted into the emitting layers （EMLs） could impede the hole injection and facilitate the electron transport, which can improve the carrier balance and further expand the exciton generation region. The maximal current efficiency of the optimal device is 5.89 cd/A at 1.81 mA/cm2 , which is about 2.19 times higher than that of the control device （CD） without the CCL, and the maximal luminance is 19.660 cd/m2 at 12V. The device shows a good color stability though the green light emitting material Alq3 is introduced as the CCL in the EML, but it has a poor lifetime due to the formation of cationic Alq3 species.
11-5639/O4
Bai Juan-Juan , Wu Xiao-Ming , Hua Yu-Lin , Mu Xue , Bi Wen-Tao , Su Yue-Ju , Jiao Zhi-Qiang, Shen Li-Ying , Yin Shou-Gen , Zheng Jia-Jin（a） Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin Key Laboratory of Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China b） College of Optoelectronics Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
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Snippet We demonstrate high current efficiency of a blue fluorescent organic light-emitting diode （OLED） by using the charge control layers （CCLs） based on Alq3 . The...
We demonstrate high current efficiency of a blue fluorescent organic light-emitting diode (OLED) by using the charge control layers (CCLs) based on Alq sub(3)....
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StartPage 504
SubjectTerms Alq3
Carriers
Cationic
Charge
Devices
Electron transport
Fluorescence
Luminance
Organic light emitting diodes
发射区
控制层
有机发光二极管
电流效率
电荷
绿色发光材料
蓝色荧光
Title Efficiency of a blue organic light-emitting diode enhanced by inserting charge control layers into the emission region
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