A methodology for improving laser beam induced current images of dye sensitized solar cells.
A methodology for improving laser beam induced current images of dye sensitized solar cells.
复制标题
一种改进染料敏化太阳能电池激光束感应电流图像的方法。
DOI：
10.1063/1.3147381
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Joaquín Martín
中科院分区：
文献类型：
--
作者：
F. J. Navas;R. Alcántara;C. Fernández;Joaquín Martín
使用激光束感应电流（LBIC）技术来研究太阳能电池和光伏器件，可以获得代表在这些元件表面观察到的不同程度的量子效率的图像。与基于固-固界面的太阳能电池相比，染料敏化太阳能电池（DSSC）或光电化学太阳能电池对辐照度变化的响应很慢——长达数十秒。这基本上是由于粘性物质传输过程和负载转移造成的。当设备连续工作时，这种响应是不可察觉的，但当执行 LBIC 扫描时，激光从一个点快速移动到另一个点，缓慢的响应会产生记忆效应，并且在一个给定点生成的信号取决于先前激发位置的转换效率系数，导致图像弥散且缺乏清晰度。这项工作提出了一种使用基于辐照区域放电过程动力学的算法来校正 DSSC 高分辨率 LBIC 映射的方法。通过将该算法应用于 LBIC 映射的实验来评估该方法的有效性。
Using the laser beam induced current (LBIC) technique for the study of solar cells and photovoltaic devices, it is possible to obtain images representing the different degrees of quantum efficiency observed on the surface of these elements. Dye sensitized solar cells (DSSCs) or photoelectrochemical solar cells, in contrast to those based on solid-solid interfaces, show a slow response to irradiance variations--up to tens of seconds. This is basically due to both viscous matter transport processes and load transfer. This response is inappreciable when the device is functioning continuously but when a LBIC scan is performed, in which the laser moves quickly from one point to another, the slow response produces a memory effect and the signal generated at one given point depends on the conversion efficiency coefficients of the previously excited positions, resulting in diffuse images and a lack of sharpness. This work presents a methodology to correct high-resolution LBIC mappings of DSSCs using an algorithm based on the kinetics of the discharge process of the irradiated zone. The validity of the proposed method has been evaluated by carrying out experiments where the algorithm has been applied to LBIC mappings.
影响因子：
15
作者：
NAZEERUDDIN, MK;KAY, A;GRATZEL, M
通讯作者：
GRATZEL, M