Journal : New Journal of Chemistry
Title : Morphology adjustable CoxN with 3D mesoporous structure and amorphous
N-doped carbon for overall water splitting
Authors : Seung Hee Choi‡, Seok Bin Kwon‡, Jung Hyeon Yoo, Young Hyun Song, Jae Pil Kim, Bong Kyun Kang and Dae Ho Yoon*
Abstract : The CsPbBr3/Cs4PbBr6 perovskite composite, which exhibits highly efficient pure green luminescence and better long-term stability than CsPbBr3 nanocrystals, has emerged for wide color gamut display and various optoelectronic applications. While many reports have been made on the optoelectronic properties of perovskite materials, study of the rapid mass synthesis of this material remains challenging. In addition, more case studies are still needed to optimize the conditions such as the differences in raw materials or addition of ligands, and to clarify these changes. Here, a new synthesis strategy is reported that enables rapid mass synthesis of green-emitting perovskite composite by forming ultrafine reverse microemulsions by hydraulic shear. Furthermore, in this synthesis method, the ratio of oleylamine (OLA)/oleic acid (OA) plays an important role in the improvement of photoluminescence quantum yields (PLQY), which is ascribed to the increase of luminescent CsPbBr3 in the Cs4PbBr6 matrix. This high color purity green-emitting perovskite composite exhibits excellent optical properties of high PLQY of 50.6 %, emission wavelength at 519 nm, with narrow full-width at half-maximum of 22.4 nm.
DOI : will be updated..