光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
SPECTROSCOPY AND SPECTRAL ANALYSIS
2009年
12期
3223-3227
,共5页
异质结%过热电子%固态阴极射线发光%SiO_2二次特性
異質結%過熱電子%固態陰極射線髮光%SiO_2二次特性
이질결%과열전자%고태음겁사선발광%SiO_2이차특성
Heterojunction%Hot electrons%Solid-state cathodoluminescence%Super liner characteristic of SiO_2
在薄膜电致发光中采用有机聚合物MEH-PPV和无机半导体SiO_2复合制成异质结发光器件,利用SiO_2的加速、倍增和离化的二次特性,实现了固态阴极射线发光.结构为ITO/SiO_2/MEH-PPV/SiO_2/Al的发光器件,其电致发光光谱的显著特征是有两个发光谱带.光谱中除了波长较长(峰值为583 nm)的MEH-PPV的激子发光谱外,还观察到了波长较短(峰值为403 nm)的蓝色发光谱,并且长短波的发光强度随着电压的不同而变化.电压较低时,只有长波光发射.当电压较高时,只有短波光存在.这种有两个谱带的发光是固态阴极射线发光的独特标志,它是一种全新的激发方式,引发出发光学中一些新而重要的问题.固态阴极射线发光理论的重要方面之一就足SiO_2的二次特性.文章研究了固态阴极射线发光动力学问题,高电场下SO_2二次特性及厚度对二次特性的影响.
在薄膜電緻髮光中採用有機聚閤物MEH-PPV和無機半導體SiO_2複閤製成異質結髮光器件,利用SiO_2的加速、倍增和離化的二次特性,實現瞭固態陰極射線髮光.結構為ITO/SiO_2/MEH-PPV/SiO_2/Al的髮光器件,其電緻髮光光譜的顯著特徵是有兩箇髮光譜帶.光譜中除瞭波長較長(峰值為583 nm)的MEH-PPV的激子髮光譜外,還觀察到瞭波長較短(峰值為403 nm)的藍色髮光譜,併且長短波的髮光彊度隨著電壓的不同而變化.電壓較低時,隻有長波光髮射.噹電壓較高時,隻有短波光存在.這種有兩箇譜帶的髮光是固態陰極射線髮光的獨特標誌,它是一種全新的激髮方式,引髮齣髮光學中一些新而重要的問題.固態陰極射線髮光理論的重要方麵之一就足SiO_2的二次特性.文章研究瞭固態陰極射線髮光動力學問題,高電場下SO_2二次特性及厚度對二次特性的影響.
재박막전치발광중채용유궤취합물MEH-PPV화무궤반도체SiO_2복합제성이질결발광기건,이용SiO_2적가속、배증화리화적이차특성,실현료고태음겁사선발광.결구위ITO/SiO_2/MEH-PPV/SiO_2/Al적발광기건,기전치발광광보적현저특정시유량개발광보대.광보중제료파장교장(봉치위583 nm)적MEH-PPV적격자발광보외,환관찰도료파장교단(봉치위403 nm)적람색발광보,병차장단파적발광강도수착전압적불동이변화.전압교저시,지유장파광발사.당전압교고시,지유단파광존재.저충유량개보대적발광시고태음겁사선발광적독특표지,타시일충전신적격발방식,인발출발광학중일사신이중요적문제.고태음겁사선발광이론적중요방면지일취족SiO_2적이차특성.문장연구료고태음겁사선발광동역학문제,고전장하SO_2이차특성급후도대이차특성적영향.
For electricity induced luminescence of thin film, the heterojunction luminescence devices were produced by compoun-ding the organic polymer of MEH-PPV and inorganic semiconductor SiO_2. Utilizing the super liner characteristic of SiO_2 as ac-celeration, multiplication and ionization, the solid-state cathocloluminescence was realized. The obvious feature of electrolumines-cence in the luminescence device with ITO/SiO_2/MEH-PPV/SiO_2/Al is that it has two spectral bands. In the electrolumines-cence spectra, the authors obtained both blue emission(403 nm)and excition luminescence(583 nm)of MEH-PPV and the intensi-ty of the long and short wave peak changing with the voltage. Only long wave peak is observed when the voltage is low and only short wave peak appears when the voltage is high. It is the typical feature that the solid-state cathodoluminescence has two spec-tral bands. It is a new light emission, which has new mechanism and is important for the luminescence. One of the important as-pects of the solid state cathodoluminescence theory is the super liner characteristic of SiO_2. In the present paper, the lumines-cence dynamics of solid-state cathodoluminescence, the super liner characteristic of SiO_2 in the higher electric field and the influ-ences of thickness on it were studied.
