论文标题
光伏和光电化学设备中光生荷载载体的空间收集效率
The spatial collection efficiency of photogenerated charge carriers in photovoltaic and photoelectrochemical devices
论文作者
论文摘要
空间收集效率描绘了光伏和光电化学设备中的驱动力和损失机制。它被定义为在对光电流有助于的设备内特定点产生的光生荷载载体的比例。在分层平面结构中，空间收集效率可以从经验上从光电流作用光谱测量中提取出，没有先验的假设。尽管该方法应用于由精心理解的材料制成的光伏细胞，但它从未用于研究非常规材料，例如通常用于光电化学细胞中的金属氧化物半导体。该观点表明，这种方法必须提供调查具有未知属性的新材料和设备的机会。该方法的相对简单性及其对操作的性能表征的适用性，使其成为分析和设计新光伏和光电化学材料和设备的重要工具。
The spatial collection efficiency portrays the driving forces and loss mechanisms in photovoltaic and photoelectrochemical devices. It is defined as the fraction of photogenerated charge carriers created at a specific point within the device that contribute to the photocurrent. In stratified planar structures, the spatial collection efficiency can be extracted out of photocurrent action spectra measurements empirically, with few a priori assumptions. Although this method was applied to photovoltaic cells made of well-understood materials, it has never been used to study unconventional materials such as metal-oxide semiconductors that are often employed in photoelectrochemical cells. This perspective shows the opportunities that this method has to offer for investigating new materials and devices with unknown properties. The relative simplicity of the method, and its applicability to operando performance characterization, makes it an important tool for analysis and design of new photovoltaic and photoelectrochemical materials and devices.
