Wu Jiajing, Tong Jianyu, Gao Yuan, Wang Aifei, Zhang Tao, Tan Hairen, Nie Shuming, Deng Zhengtao
College of Engineering and Applied Sciences, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu, 210023, P. R. China.
Departments of Bioengineering, Chemistry, Electrical and Computer Engineering, and Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
Angew Chem Int Ed Engl. 2020 May 11;59(20):7738-7742. doi: 10.1002/anie.201911638. Epub 2020 Mar 6.
A novel triphenylphosphine (TPP) treatment strategy was developed to prepare the near-infrared emission CsPbI nanocrystal (NC)-polymer composite thin-film luminescent solar concentrators (LSCs) featuring high absolute photoluminescence quantum yield (PLQY), low reabsorption, and high stability. The PL emission of the LSCs is centered at about 700 nm with 99.4±0.4 % PLQY and narrow full width at half maximum (FWHM) of 75 meV (30 nm). Compared with LSCs prepared with classic CsPbI NCs, the stability of the LSCs after TPP treatments has been greatly improved, even after long-term (30 days) immersion in water and strong mercury-lamp irradiation (50 mW cm ). Owing to the presence of lone-pair electrons on the phosphorus atom, TPP is also used as a photoinitiator, with higher efficiency than other common photoinitiators. Large-area (ca. 75 cm ) infrared LSCs were achieved with a high optical conversion efficiency of 3.1 % at a geometric factor of 10.
开发了一种新型三苯基膦（TPP）处理策略，以制备具有高绝对光致发光量子产率（PLQY）、低重吸收和高稳定性的近红外发射CsPbI纳米晶体（NC）-聚合物复合薄膜发光太阳能聚光器（LSC）。LSC的PL发射集中在约700nm处，PLQY为99.4±0.4%，半高宽（FWHM）窄，为75meV（30nm）。与用经典CsPbI NC制备的LSC相比，TPP处理后的LSC稳定性大大提高，即使在水中长期（30天）浸泡和强汞灯照射（50mW/cm²）后也是如此。由于磷原子上存在孤对电子，TPP还用作光引发剂，其效率高于其他常见光引发剂。在几何因子为10的情况下，实现了大面积（约75cm²）的红外LSC，光学转换效率高达3.1%。
