• Title/Summary/Keyword: DADB

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White OLEDs with a Single Emissive Layer (단일발광층을 이용한 백색 OLED)

  • Chu, Hye-Yong;Lee, Jeong-Ik;Yang, Yong-Suk;Oh, Ji-Young;KoPark, Sang-Hee;Kim, Mi-Kyung;Hwang, Chi-Sun;Jung, Byung-Jun;Shim, Hong-Ku;Jang, Jin
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2004.05a
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    • pp.43-46
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    • 2004
  • We demonstrated efficient white light emitting OLEDs with a single emissive layer structure, which was blue-emitting 1,4-bis[2,2-diphenylvinyl]biphenyl (DPVBi) doped with blue luminescent amino-substituted distyrylarylene amine (DSA-amine) and red luminescent [2,6-bis[2-[5-(dibutylamino) phenyl]vinyl]-4H -pyran-4-ylidene]propanedinitrile (DADB). Through the optimization of the device structure, the white light emission with full visible spectral range was obtained. Its CIE color coordinates was (0.32,0.42) at 10 $mA/cm^2$ and the external quantum efficiency, the luminance efficiency and the luminance yield were 3.7 %, 3.3 lm/W and 9.0 cd/A, respectively.

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Development of Synthesis Process for Ammonia Borane using NaBH4 as the Hydrogen Storage Materials (NaBH4를 이용한 암모니아 보란 수소 저장 소재 합성 공정 개발)

  • Choi, Ho Yun;Park, Sung Jin;Jung, Sung Jin;Baek, Jong Min;Song, Han Dock;Kim, Jong Soo;Lee, Kun Jong;Kim, Young Lae
    • Transactions of the Korean hydrogen and new energy society
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    • v.25 no.5
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    • pp.475-481
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    • 2014
  • Ammonia borane ($NH_3BH_3$), as a source material for energy generation and hydrogen storage, has attracted growing interest due to its high hydrogen content. We have investigated the synthesis of ammonia borane from sodium borohydride ($NaBH_4$) and ammonium chloride ($NH_4Cl$) utilizing a low-temperature process. From our results, we obtained a maximum synthetic yield of 98.2% of ammonia borane complex. The diammoniate diborane (DADB) was detected in about 5~10mol% with in the solid ammonia borane by solid-state $^{11}B$-NMR analysis. The synthesized solid ammonia borane products were studied to characterize hydrogen release upon thermal dehydrogenation.