Facile synthesized ZnO microcrystals for random microlasers and incandescent-type light sources. Issue 44 (21st October 2019)

• Record Type: Journal Article
• Authors: Ji, Jiaolong; Jiang, Mingming; Mao, Wangqi; Wan, Peng; Kan, Caixia
• Is Part Of: CrystEngComm. Volume 21:Issue 44(2019)
• Page Start: 6772
• Page End: 6783
• Publication Date: 2019-10-21
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c9ce01343a
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Well-crystallized ZnO microcrystals (MCs) with a well-faceted, smooth surface were successfully synthesized and employed to construct ultraviolet microsized random lasers. Abstract : In this context, well-crystallized ZnO microcrystals (MCs) with a well-faceted smooth surface were successfully synthesized. Due to the outstanding optical response and well-faceted crystallites, the as-synthesized low-dimensional crystals were employed to construct ultraviolet microsized random lasers. Additionally, the micro/nanocrystal being foreseen as key elements were deposited on the pre-synthesized Ga-doped ZnO microwires (ZnO/ZnO:Ga MWs) using a two-step vapor-transporting synthesis method. By adjusting the as-synthesized condition, the incorporation of ZnO MCs can be utilized to tailor the fundamental optical and electronic transport properties of the pre-synthesized MWs. In particular, a single ZnO/ZnO:Ga MW was selected to construct a typical incandescent light source, with the lighting being color-tuned in a wide spectral region. The intrinsic working principle of the color-tuning electroluminescence may be attributed to type-II energy band alignment towards the interface of ZnO/ZnO:Ga. Therefore, individual ZnO/ZnO:Ga MWs can endow a new sense of the oldest and simplest incandescent-type sources. It can be anticipated that the lighting features of ZnO MC sheathed ZnO:Ga MW radial structures are extremely attractive for potential applications in ZnO based optoelectronic devices, such as microsized diodes and lasers, waveguides, high gain photodetectors, etc.