The electroluminescent characteristics of blue organic light-emitting diodes （BOLEDs） fabricated with doped charge carrier transport layers are analyzed. The fluorescent blue dopant BCzVBi is doped in an emissive la...The electroluminescent characteristics of blue organic light-emitting diodes （BOLEDs） fabricated with doped charge carrier transport layers are analyzed. The fluorescent blue dopant BCzVBi is doped in an emissive layer, hole transport layer （HTL） and electron transport layer （ETL）, respectively, to optimize the probability of ex- citon generation in the BOLEDs. The luminance and luminous efficiency of BOLEDs made with BCzVBi-doped HTL and ETL increase by 22% and 17% from 11,683 cd/m2 at 8.5 V and 6.08 cd/A at 4.0 V to 14,264 cd/m2 at 8.5 V and 7.13 cd/A at 4.0 V while CIE coordinates of （0.15, 0.15） of both types of BOLEDs remained unchanged. The electron mobility of BCzVBi is estimated to be 1.02 × 10-5 cm2/Vs by TOF.展开更多
The organic solar cell technology has attracted great interests due to its potential of low cost solution process capability. Bulk heterojunction organic solar cells offer a potentially much cheaper alternative way to...The organic solar cell technology has attracted great interests due to its potential of low cost solution process capability. Bulk heterojunction organic solar cells offer a potentially much cheaper alternative way to harness solar energy, and can be made flexible and large area. They can also be made translucent and in different colors. As a result, the inexpensive fabrication process such as solution- process techniques, mechanical flexibility, light weight and visible-light transparency features make organic solar technology attractive for application in new markets, such as smart sensors, power generating window panes, building architecture, greenhouses and outdoor lifestyle, etc. After a brief overview of basics of organic photo- voltaics, the enhancement of semitransparent organic solar cells over the two competing performance indices of power conversion efficiency and transmittance will be discussed.展开更多
In practical applications, the visual contrast of an emissive display is more important than the brightness of image. As such, improving the visual contrast in organic light-emitting diodes （OLEDs） is another import...In practical applications, the visual contrast of an emissive display is more important than the brightness of image. As such, improving the visual contrast in organic light-emitting diodes （OLEDs） is another important issue to address with a significant technological implication. This talk will discuss the progress in developing gradient refractive index transparent electrode for enhancing the visual contrast in OLEDs. The concept is based upon on using an electrode with a gradient or graded refractive index to minimize the ambient light reflection from OLEDs and hence to enhance the visual contrast. The transparent electrode with gradient refractive index can be easily engineered and optimized during the film deposition, providing a cost-effective approach for application in high contrast OLED displays展开更多
基金supported by the National Natural Science Foundation of China (U21A20496,61922060,62205235,62204157,61805172,12104334,62174117,and 61905173)the Graduate Innovation Project of Shanxi Province (2020BY117)+9 种基金the Key Research and Development (International Cooperation)Program of Shanxi Province (201803D421044)the Natural Science Foundation of Shanxi Province (20210302123154 and 20210302123169)Research Project Supported by Shanxi Scholarship Council of China (2021-033)Research Project Supported by Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering (2021SX-FR008 and 2022SX-TD020)Introduction of Talents Special Project of Lvliang City (Rc2020206,Rc2020207)Transformation Cultivation Project of University Scientific and Technological Achievements of Shanxi Province (2020CG013)the Key Research and Development Program of Shanxi Province (202102150101007)the support from the Research Grants Council,University Grants Committee,Hong Kong,General Research Fund (12303920)SZ-HK-Macao Science and Technology Plan Project (SGDX2020110309540000)Guangdong Basic and Applied Basic Research Fund (2022A1515010020)。
基金supported by the Ministry of Education,Science,and Technology (MEST)
文摘The electroluminescent characteristics of blue organic light-emitting diodes （BOLEDs） fabricated with doped charge carrier transport layers are analyzed. The fluorescent blue dopant BCzVBi is doped in an emissive layer, hole transport layer （HTL） and electron transport layer （ETL）, respectively, to optimize the probability of ex- citon generation in the BOLEDs. The luminance and luminous efficiency of BOLEDs made with BCzVBi-doped HTL and ETL increase by 22% and 17% from 11,683 cd/m2 at 8.5 V and 6.08 cd/A at 4.0 V to 14,264 cd/m2 at 8.5 V and 7.13 cd/A at 4.0 V while CIE coordinates of （0.15, 0.15） of both types of BOLEDs remained unchanged. The electron mobility of BCzVBi is estimated to be 1.02 × 10-5 cm2/Vs by TOF.
文摘The organic solar cell technology has attracted great interests due to its potential of low cost solution process capability. Bulk heterojunction organic solar cells offer a potentially much cheaper alternative way to harness solar energy, and can be made flexible and large area. They can also be made translucent and in different colors. As a result, the inexpensive fabrication process such as solution- process techniques, mechanical flexibility, light weight and visible-light transparency features make organic solar technology attractive for application in new markets, such as smart sensors, power generating window panes, building architecture, greenhouses and outdoor lifestyle, etc. After a brief overview of basics of organic photo- voltaics, the enhancement of semitransparent organic solar cells over the two competing performance indices of power conversion efficiency and transmittance will be discussed.
文摘In practical applications, the visual contrast of an emissive display is more important than the brightness of image. As such, improving the visual contrast in organic light-emitting diodes （OLEDs） is another important issue to address with a significant technological implication. This talk will discuss the progress in developing gradient refractive index transparent electrode for enhancing the visual contrast in OLEDs. The concept is based upon on using an electrode with a gradient or graded refractive index to minimize the ambient light reflection from OLEDs and hence to enhance the visual contrast. The transparent electrode with gradient refractive index can be easily engineered and optimized during the film deposition, providing a cost-effective approach for application in high contrast OLED displays
