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Enhanced bulk photovoltaic effect in ZnO:Bix (p-type)/MoS2 (n-type) heterostructure by tuning Bi content
摘要： To investigate the metal oxide thin film application in optoelectronic field via changing its conduction type, the p-n junction with Bi-doped p-type ZnO and n-type MoS2 is fabricated by pulsed laser deposition. In this work, we explore the photovoltaic effect of the ZnO/MoS2 heterostructure, focusing on the function of tuning Bi contents in enhancing the photoelectric conversion efficiency. Doping-Bi ZnO thin film perfectly shows stable p-type semiconductor properties with high carrier concentration (about from 1×1016 to 1×1017 cm-3), high rational mobility (363 cm2/(υs)) and low resistivity (216.7 Ω). In addition, MoS2 clearly exhibits large quantities of nanosheets and distinct vertically standing structure. The power conversion efficiency (PCE) of ZnO:Bix/MoS2 enhances from 0.518 % to 2.430 % along with increasing doping Bi element from 1 % to 7 %, but when doping Bi content reaches 10 %, the PCE decrease 0.552 %. Essentially, the ability of capturing photon-generated carriers in ZnO:Bix film gradually increases as doping Bi content to without excessive doping content. These findings illustrate that this proposed Bi-doped ZnO has potential in promoting the photoelectric conversion efficiency of MoS2 based p-n junction.
关键词： photovoltaic effect,Doping - Bi,p-type ZnO,ZnO/MoS2
更新于2025-09-11 14:15:04
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Hybrid photosensitive structures based on nematic liquid crystals and lithium niobate substrates
摘要： Liquid crystal cells based on lithium niobate substrates have recently been proposed as good candidates for optofluidic devices and for light-induced controlled generation of defects in liquid crystal films. The peculiarity of these structures lies in the possibility of using the bulk photovoltaic effect of lithium niobate to obtain an optically induced dc field able to affect the molecular liquid crystal director. Reversible fragmentation and self-assembling of liquid crystal droplets driven by the lithium niobate pyroelectric properties have also been reported. We review the basic results obtained so far with the aim of making the point and seeing what else can be done in the framework of the realization of hybrid structures combining lithium niobate with the electro-optical and nonlinear optical properties of liquid crystals.
关键词： pyroelectric effect,optofluidic devices,lithium niobate,liquid crystals,photovoltaic effect
更新于2025-09-09 09:28:46