One-step room temperature rapid synthesis of Cu2Se nanostructures, phase transformation, and formation of p-Cu2Se/p-Cu3Se2 heterojunctions. Issue 27 (2nd June 2016)

• Record Type: Journal Article
• Authors: Zhu, Lianjie; Zhao, Yanxing; Zheng, Wenjun; Ba, Ningning; Zhang, Guangzhi; Zhang, Jing; Li, Xiaoting; Xie, Hanjie; Bie, Lijian
• Is Part Of: CrystEngComm. Volume 18:Issue 27(2016)
• Page Start: 5202
• Page End: 5208
• Publication Date: 2016-06-02
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c6ce00370b
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : A low-energy strategy was adopted for the rapid synthesis of Cu2 Se nanostructures, which were transformed to a composite containing p-Cu2 Se/p-Cu3 Se2 heterojunctions. Abstract : A tetragonal Cu2 Se film containing a well-aligned nanosheet array with scattered 3D flower-like microstructures on top was synthesized for the first time by a rapid one-step low-energy route, which is beneficial for large scale industrial production due to savings in energy, time and expensive instruments. Phase transformation occurred after scraping the film from the Cu substrate, and heating or grinding the Cu2 Se powder in air. The Cu2 Se/Cu3 Se2 composite containing p-Cu2 Se/p-Cu3 Se2 heterojunctions was obtained by simply calcining the Cu2 Se in air at 300 °C for 3 h. The composite has enhanced gas sensing properties towards acetone gas and a lower band gap energy compared to Cu2 Se.