Up-conversion Emission of Organic Materials in Large Barrier height

2014 Fiscal Year Final Research Report

• 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
• Keywords: アップコンバージョン / 燐光 / 逆エネルギー移動 / 長寿命

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.

Free Research Field

光化学