Pengfei Niu, Guiwen Luo, Tianjun Yu, Jinping Chen, Rui Hu, Guoqiang Yang, Yi Zeng and Yi Li
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引用次数: 0
Abstract
Extracting excitonic energy from halide perovskite nanocrystals (NCs) with molecules has gained extensive attention due to its potential in photochemical and optoelectronics applications; however, the extraction methods and efficiency are highly dictated by the subtle interplay between NCs and molecules. Herein, we report that fullerene derivative C61(COOH)2 can extract the excitation energy of CsPbI3 NCs via electron transfer-mediated triplet energy transfer and then sensitizes perylene for photochemical upconversion. Spectroscopic investigation reveals that the electron of excited CsPbI3 NCs transfers to C61(COOH)2 upon excitation (∼2.2 ps), leading to the formation of a charge separation state between the NCs and C61(COOH)2, followed by a subsequent hole transfer (∼393 ps) from the NCs+˙ to the fullerene radical anion giving the population of triplet fullerene. In contrast, aromatic molecules hardly extract the energy of CsPbI3 NCs in the weak confinement regime through direct Dexter-type triplet energy transfer. This study establishes fullerene as an efficient relay to extract the excitonic energy of perovskite NCs in the form of molecular triplets.
期刊介绍:
The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study:
Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability.
Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine.
Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices.
Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive.
Bioelectronics
Conductors
Detectors
Dielectrics
Displays
Ferroelectrics
Lasers
LEDs
Lighting
Liquid crystals
Memory
Metamaterials
Multiferroics
Photonics
Photovoltaics
Semiconductors
Sensors
Single molecule conductors
Spintronics
Superconductors
Thermoelectrics
Topological insulators
Transistors