Tandem energy upconversion in a conjugated polymer-sensitized core/shell nanocrystal

被引：4
作者：
Ji, Yu [1 ,2 ]
Lu, Feng [1 ,2 ]
Tang, Yufu [1 ,2 ]
Qian, Wen [1 ,2 ]
Fan, Quli [1 ,2 ]
Huang, Wei [1 ,2 ,3 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Key Lab Organ Elect & Informat Displays, 9 Wenyuan Rd, Nanjing 210023, Peoples R China
[2] Nanjing Univ Posts & Telecommun, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, IAM, 9 Wenyuan Rd, Nanjing 210023, Peoples R China
[3] NPU, SIFE, Xian 710072, Peoples R China
来源：
INORGANIC CHEMISTRY COMMUNICATIONS | 2020年 / 111卷
基金：
中国国家自然科学基金;
关键词：
Upconversion nanoparticles; Conjugated polymer-sensitized; Tandem energy; Photostability; PHOTODYNAMIC THERAPY; NANOPARTICLES; EFFICIENT;
D O I：
10.1016/j.inoche.2019.107640
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
We developed a novel hybrid system combining inorganic NaYF4: Yb3+, Er3+@NaYF4:Yb3+ core/shell nanocrystal with organic diketopyrrolopyrrole-based conjugated polymer (PDFT). Directional energy transfer from light-harvesting PDFT to Yb3+ ions in the shell, and finally to the emitter Er3+ ions in the core takes place in this hybrid system so as to boost UCNPs upconversion efficiency. The number of antennas (concentration of PDFT) was optimized to maximize tandem energy transfer efficiency. PDFT increase the emission intensity of UCNPs by similar to 39-fold and having a wide range of excitable spectrum range (600-850 nm). Importantly, polymer sensitized upconversion nanosystems was much more stable compared to traditional small molecule sensitized ones, which can be important for their further applications.
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页数：5
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