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Interface Study of the Intermediate Connectors in Tandem Organic Devices
Jian-Xin Tang,Man-Keung Fung,Chun-Sing Lee,Shuit-Tong Lee 한국정보디스플레이학회 2010 Journal of information display Vol.11 No.1
The intermediate connectors play crucial roles in the performance of tandem organic light-emitting diodes (OLEDs) because they are required to facilitate charge carrier transport and to guarantee transparency for light transmission and deposition compatibility. Understanding the physical properties of the intermediate connector is not only fundamentally important but is also crucial to developing high-efficiency organic devices with a tandem structure. In this study, several effective intermediate connectors in tandem OLEDs using a doped or non-doped organic p-n heterojunction were systematically investigated by studying their interfacial electronic structures and corresponding device characteristics. The working mechanisms of the intermediate connectors are discussed herein by referring to their relevant energy levels with respect to those of the neighboring organic layers. The factors affecting the operation of the intermediate connectors in tandem OLEDs, as demonstrated herein, provide guidance for the identification of new materials and device architectures for high-performance devices.
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Interface Study of the Intermediate Connectors in Tandem Organic Devices
Tang, Jian-Xin,Fung, Man-Keung,Lee, Chun-Sing,Lee, Shuit-Tong The Korean Infomation Display Society 2010 Journal of information display Vol.11 No.1
The intermediate connectors play crucial roles in the performance of tandem organic light-emitting diodes (OLEDs) because they are required to facilitate charge carrier transport and to guarantee transparency for light transmission and deposition compatibility. Understanding the physical properties of the intermediate connector is not only fundamentally important but is also crucial to developing high-efficiency organic devices with a tandem structure. In this study, several effective intermediate connectors in tandem OLEDs using a doped or non-doped organic p-n heterojunction were systematically investigated by studying their interfacial electronic structures and corresponding device characteristics. The working mechanisms of the intermediate connectors are discussed herein by referring to their relevant energy levels with respect to those of the neighboring organic layers. The factors affecting the operation of the intermediate connectors in tandem OLEDs, as demonstrated herein, provide guidance for the identification of new materials and device architectures for high-performance devices.
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B40 fullerene: An efficient material for CO2 capture, storage and separation
Huilong Dong,Bin Lin,Keith Gilmore,Tingjun Hou,Shuit-Tong Lee,Youyong Li 한국물리학회 2015 Current Applied Physics Vol.15 No.9
Novel nanomaterials are promising for capture, storage and separation of CO2. By density functional calculations, we find that the newly discovered B40 fullerene is a suitable candidate. CO2 forms stable chemisorptions with B40 on specific sites, which is validated by the high adsorption energy, large charge transfer, and kinetic feasibility for B40(CO2) complexes. Due to the strong chemisorption, B40 shows high adsorption capacity for CO2 (up to 13.87 mmol/g). In addition, B40 shows good selectivity for CO2 and is efficient in separating it from gas mixtures like CO2/N2, CO2/H2, and CO2/CH4.
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