Development of organic thin-film solar cell using triplet triplet annihilation photon energy upconversion

2015 Fiscal Year Final Research Report

• Project/Area Number: 26870187
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Device related chemistry; Energy-related chemistry
• Research Institution: The University of Tokyo
• Principal Investigator: Sawayama Jun 東京大学, 生産技術研究所, 研究員 (30580592)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 三重項-三重項アップコンバージョン蛍光 / 有機薄膜太陽電池 / ブロックコポリマー / ミクロ相分離

Outline of Final Research Achievements

We tried to fabricate new type of organic thin-film solar cell using triplet triplet annihilation (TTA) photon energy upconversion. At first, the upconversion luminescent nanoparticles based on TTA were successfully prepared by coloading sensitizer (octaethylporphyrin Pd complex) and annihilator (9,10-diphenylanthracene) into silica nanoparticles. But, the organic thin-film solar cell mixed this silica nanoparticle was very high resistance and we couldn’t observe the upconversion luminescent. The reason of the results is caused by an aggregation of the silica nanoparticles.
To prevent the aggregation of silica nanoparticles, we used the microphase-separated nanostructures by block copolymer. We synthesized the new block-copolymer having poly(4-vinylpyridine). The spin-coated film of the block copolymer was hexagonally arranged. The P4VP cylindrical microdomains were perpendicularly oriented to the substrate.

Free Research Field

Organic chemistry