Up-conversion Emission of Organic Materials in Large Barrier height

Research Project

Project/Area Number	25870212
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Energy-related chemistry Functional solid state chemistry
Research Institution	Tokyo University of Agriculture and Technology
Principal Investigator	KENRO Totani 東京農工大学, 工学(系)研究科(研究院), 技術専門職員 (50397014)
Project Period (FY)	2013-04-01 – 2015-03-31
Project Status	Completed (Fiscal Year 2014)
Budget Amount *help	¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000) Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000) Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords	アップコンバージョン / 燐光 / 逆エネルギー移動 / 長寿命 / 光化学 / 光物性
Outline of Final Research Achievements	In this research, Conversion of thermal energy to photon due to thermally activated reversed energy transfer between the various types of donor and acceptor organic molecules was succeeded, applying the results of previous researches that the use of an amorphous rigid host significantly maintain excited state more than several seconds at room temperature in air. Barrier height of between the energy states of donor and acceptor is more than 0.4 eV, exhibiting conversion from red colored emission to green colored emission, and from yellow-green colored emission to blue-green colored emission. The efficiency of conversion yield increased with increasing temperature, and this will be expected in the application for the visualizing temperature as thermal sensors.