New patterning method for light emitting polymer = 발광 다이오드용 고분자의 새로운 패턴 형성 방법에 관한 연구

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We have patterned light emitting polymer from halo-precursor PPV [2,5-Bis(dimethyl-phenylsilyl)-1,4-bis(bromomethyl)benzene](BDMPS-PPV) and using the photobase generator(PBG) [{[(2,6-dinitrobenzyl)oxy]carbonyl}diphenylamine] through the photo-lithographic method by dehydrohalogenation reaction (E2 elimination reaction) and have successfully fabricated LEDs composed of patterned emissive layer (pattern resolution 10~30㎛). Used organic soluble halo-precursor BDMPS-PPV was synthesized through Gilch reaction under condition of 0.9 equivalent strong base. The device (configuration: ITO/ PEDOT:PSS /Polymer/Ca:Al) with photopatternable polymer by PBG showed better EL performances (lower turn-on voltage, higher maximum brightness, and EL efficiency) in contrast to behavior of LED through conventional thermal elimination methods. Based on experimently identified results, we could guess that the residual generated base may play the role of hole-transporting material, which influenced the enhanced electrical properties compared to thermally eliminated polymer. Also we have obtained the similar results of optical and electrical properties from UV exposed mixture with halo-precursor polymer and diphenylamine . We expect that this method will have several benefits for fabricating the device; in particular, the halo-precursor vinyl polymer can be simply patterned by the above method. Therefore, this photolithographic method is a potentially useful new technique for PLED fabrication in the market from microdisplay to large flat-panel display.
Advisors
Shim, Hong-Kuresearcher심홍구researcher
Description
한국과학기술원 : 화학과,
Publisher
한국과학기술원
Issue Date
2004
Identifier
237509/325007  / 020005224
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 화학과, 2004.2, [ iv, 85 p. ]

Keywords

Polymer; Electroluminescene; Patterning; 패턴; 고분자; 전기발광

URI
http://hdl.handle.net/10203/31616
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=237509&flag=dissertation
Appears in Collection
CH-Theses_Ph.D.(박사논문)
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