Solution‐Processable Near‐Infrared–Responsive Composite of Perovskite Nanowires and Photon‐Upconversion Nanoparticles

• Published in: Advanced functional materials 2018-08, Vol.28 (31), p.n/a
• Main Authors: Yang, Bingxiao, Wang, Yangbo, Wei, Tian, Pan, Yue, Zhou, Enlong, Yuan, Ze, Han, Yingdong, Li, Mengxue, Ling, Xincan, Yin, Lisha, Xie, Xiaoji, Huang, Ling
• Format: Article
• Language: English
• Subjects: Composite materials; Distance measurement; Energy gap; Energy transfer; Erbium; Light; Materials science; Metal ions; nanocomposite; Nanoparticles; Nanowires; NIR response; Optoelectronics; Perovskites; Photoelectric effect; Photoelectric emission; Photons; Rare earth elements; Remote control; Temperature effects; Upconversion; Ytterbium
• ISSN: 1616-301X; 1616-3028
• DOI: 10.1002/adfm.201801782

Organolead halide perovskites (OHPs) have shown unprecedented potentials in optoelectronics. However, the inherent large bandgap has restrained its working wavelength within 280–800 nm, while light at other regions, e.g., near‐infrared (NIR), may cause drastic thermal heating effect that goes against the duration of OHP devices, if not properly exploited. Herein, a solution processable and large‐scale synthesis of multifunctional OHP composites containing lanthanide‐doped upconversion nanoparticles (UCNPs) is reported. Upon NIR illumination, the upconverted photons from UCNPs at 520–550 nm can be efficiently absorbed by closely surrounded OHP nanowires (NWs) and photocurrent is subsequently generated. The narrow full width at half maximum of the absorption of rare earth ions (Yb3+ and Er3+) has ensured high‐selective NIR response. Lifetime characterizations have suggested that Förster resonance energy transfer with an efficiency of 28.5% should be responsible for the direct energy transfer from UCNPs to OHP NWs. The fabricated proof‐of‐concept device has showcased perfect response to NIR light at 980 and 1532 nm, which has paved new avenues for applications of such composites in remote control, distance measurement, and stealth materials. Near‐infrared–responsive nanocomposites containing perovskite nanowires and photon‐upconversion nanoparticles are easily synthesized by a solution‐processable method. Selective response to multiple wavelengths can be achieved by simply adjusting the chemical compositions and the high energy conversion efficiency of 28.5% has further proved rationality of the material design strategy, where Förster resonance energy transfer plays a critical role.