“…The ZnO thin films are used for different applications such as PEC solar cell, dye sensitized solar cell, gas sensors, thin films transistors, etc [250e257]. Zhang and Kerr [256] synthesized ZnO thin films with different morphologies. The CBD method offers a new opportunity for manipulating the morphologies of ZnO thin films by controlling the size and growth orientation of ZnO crystal, which has important applications in optoelectronic devices.…”