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Title
Japanese:9‐1: Invited Paper: Triplet‐Triplet Annihilation at Organic Semiconductor Interface for Efficient Solid‐State Photon Upconversion and Organic Light‐Emitting Diodes with Low Driving Voltage 
English:9‐1: Invited Paper: Triplet‐Triplet Annihilation at Organic Semiconductor Interface for Efficient Solid‐State Photon Upconversion and Organic Light‐Emitting Diodes with Low Driving Voltage 
Author
Japanese: 伊澤誠一郎.  
English: Seiichiro Izawa.  
Language English 
Journal/Book name
Japanese:SID Symposium Digest of Technical Papers 
English:SID Symposium Digest of Technical Papers 
Volume, Number, Page        
Published date June 2023 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://dx.doi.org/10.1002/sdtp.16495
 
DOI https://doi.org/10.1002/sdtp.16495
Abstract <jats:p>Triplet–triplet annihilation (TTA) can double the energy of excited states. We utilized a charge transfer state at an organic semiconductor interface as a precursor for efficient TTA. As a result, a solid‐state photon upconversion from near‐infrared to visible light is achieved with an efficiency that is two orders of magnitude higher than those demonstrated by conventional systems. Furthermore, it is demonstrated that an efficient organic light‐emitting diode (OLED) can be operated by only a 1.5 V battery.</jats:p>

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