发光学报2005，Vol.26Issue(1)：1-7,7.
有机场致发光中能带模型与分子理论的讨论
Dispute between Molecular and Band Theory in Organic Electroluminescence
摘要
Abstract
The dispute between molecular and band theory arose from the very beginning of extended study of organic electroluminescence. We investigated the layered optimization scheme for inorganic electroluminescence and obtained the experience of acceleration ability of Si02 being greater than 10 eV, which is large enough to excite an electroluminescence materials. We discovered solid state cathodoluminescence by means of this frame and used the newly discovered solid state cathodoluminescence to study the blue spectral shift when the applied voltage is in-creased. We found three different kinds of spectra in three consecutive intervals of applied voltage. We found that the field ionization of excitons plays a very important and critical role in this blue shift. The switching on of short wave-length emission (recombination radiation) starts only after the beginning of this field ionization. The exciton emission obeys molecular theory and the recombination obeys energy band theory. Thus their demarcation is the appearance of field ionization of excitons. Since the ionization is changing with electric field continuously, there is a region of coexistence of these two processes.关键词
激子的场离化/辐射复合/能带理论与分子模型Key words
field ionization of exciton/recombination/band theory and molecular theory分类
数理科学引用本文复制引用
徐叙瑢,徐征,曲崇,滕枫,娄志东..有机场致发光中能带模型与分子理论的讨论[J].发光学报,2005,26(1):1-7,7.基金项目
国家自然科学基金(10374001,9031004) （10374001,9031004）
RFDP(20020004004) （20020004004）
NSFB(2032015) （2032015）
国家"973"计划(2003CB314707)和博士后基金(2003034324)资助项目 （2003CB314707）
