Up-Conversion Device Based on Quantum Dots with High Conversion Efficiency over 6%

Haodong Tang, Kanming Shi, Nan Zhang, Zuoliang Wen, Xiangtian Xiao, Bing Xu, Haider Butt, Zoe Pikramenou, Kai Wang, Xiao Wei Sun
2020 IEEE Access  
Near infrared to visible up-conversion devices have every growing demand in a myriad of industrial sectors including photovoltaics, energy harvesting, medicine and imaging. Here we have demonstrated an up-conversion device which utilizes quantum dots for both infrared absorption and visible emission. The band structure of the device is designed and optimized with well-constructed carrier transport and blocking layers. The achieved up-conversion device exhibits an impressive conversion
more » ... onversion efficiency of over 6 %, with a high near infrared on-off ratio of over 10 4 . The device demonstrates a potential new approach for an up-conversion device designed solely on quantum dots with high efficiency. INDEX TERMS NIR-visible up-conversion device, quantum dots, solution-processed.
doi:10.1109/access.2020.2987043 fatcat:4vvsc3ribjflnm3uqbovkdtwfa