A novel cage-like CdTe film with enhanced photoelectrochemical performance

作者：Wang, Jun; Lv, Pin; Mu, Yannan; Ding, Dong; Liu, Li; Runa, A.; Feng, Fei; Feng, Shuang; Fu, Wuyou; Yang, Haibin^*

来源：RSC Advances, 2016, 6(49): 43489-43495.

DOI：10.1039/c6ra00691d

• CDS/CDTE SOLAR-CELL
• ELECTRODEPOSITED CDTE
• NANOWIRE ARRAYS
• HEAT-TREATMENT
• THIN-FILMS
• GROWTH
• DEPOSITION
• ENERGY
• MICROSTRUCTURE
• FABRICATION

A novel cage-like CdTe film with even porosity size and good connectivity among particles is successfully prepared by a simple technique for the first time. The field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and UV-Vis absorption spectra are used to characterize the morphology, crystallinity and optical property of the new structure. The FESEM observation confirms the formation of cage-like CdTe film after heat treatment. The structural and optical studies reveal that the cage-like CdTe films show better crystallinity and enhanced optical absorption. Based on the characterization results, the possible growth mechanism of the cage-like CdTe film is proposed. Furthermore, the photoelectrochemical property of the film is also investigated by photocurrent and current density-voltage curves and electrochemical impedance spectroscopy (EIS). The cage-like CdTe film yields an enhanced photocurrent and current density of 3.8 mA cm(-2), which is significantly higher than other as-prepared CdTe films. Meanwhile, the cage-like CdTe films present improved charge transfer properties and corroborate the photocurrent and current density-voltage measurements. The photostability of the films is also studied. The better photoelectrochemical property of the cage-like CdTe films suggests their potential application in nanostructured solar energy conversion devices.

• 出版日期2016
• 单位黑河学院; 吉林大学; 超硬材料国家重点实验室