Organic green light emitting devices(LEDs) with multi-quantum well(MQW) structure were fabricated. Aromatic diamine(TPD) was used as hole-transporting layer and potential barrier layer; Tris(8-hydroxyquinoline) alumin...Organic green light emitting devices(LEDs) with multi-quantum well(MQW) structure were fabricated. Aromatic diamine(TPD) was used as hole-transporting layer and potential barrier layer; Tris(8-hydroxyquinoline) aluminum(Alq 3) was acted as electron-transporting emitter and MQW green emitter. Air-stable aluminum(Al) was used as electron-injection contact. The influence of the thickness of potential barrier layer and the number of quantum well on the electroluminescent(EL) efficiencies of the devices was investigated. The organic LEDs with two quantum wells showed enhanced EL efficiencies. Maximum external quantum efficiency and brightness were 1.04 % and 7 000 cd/m 2, respectively.展开更多
Legal aid has recently come into the spotlight once again given the Central Government’s release of a document on further expanding the system in late June.China established a nationwide legal aid network following t...Legal aid has recently come into the spotlight once again given the Central Government’s release of a document on further expanding the system in late June.China established a nationwide legal aid network following the introduction of the Legal Aid Regulations in September 2003,whereby lawyers were organized into legal aid agencies set up by the government to offer free legal services to people facing economic hardship or involved in special cases.Since the system’s introduction,the financial input into legal aid by governments at various levels has grown rapidly.展开更多
文摘Organic green light emitting devices(LEDs) with multi-quantum well(MQW) structure were fabricated. Aromatic diamine(TPD) was used as hole-transporting layer and potential barrier layer; Tris(8-hydroxyquinoline) aluminum(Alq 3) was acted as electron-transporting emitter and MQW green emitter. Air-stable aluminum(Al) was used as electron-injection contact. The influence of the thickness of potential barrier layer and the number of quantum well on the electroluminescent(EL) efficiencies of the devices was investigated. The organic LEDs with two quantum wells showed enhanced EL efficiencies. Maximum external quantum efficiency and brightness were 1.04 % and 7 000 cd/m 2, respectively.
文摘Legal aid has recently come into the spotlight once again given the Central Government’s release of a document on further expanding the system in late June.China established a nationwide legal aid network following the introduction of the Legal Aid Regulations in September 2003,whereby lawyers were organized into legal aid agencies set up by the government to offer free legal services to people facing economic hardship or involved in special cases.Since the system’s introduction,the financial input into legal aid by governments at various levels has grown rapidly.
