IQE-SCAN

IQE-SCAN 光谱量子效率和反射
该工具专为自动IQE分析而设计
晶体硅太阳能电池。一些功能是：

太阳能电池用可变光照射，均匀地照射在20 x 20 mm的区域内，
或者以约为焦点的焦点。 1 x3mm²。
通过连续移动4cm²照明区域进行全面积EQE和反射测量。
单色器在280-1600 nm之间的单色光（2个光栅，狭缝宽度和顺序滤光片自动改变）。通常使用的带宽是8nm FWHM，波长精度是1nm。
高达1.2太阳的白色偏光仅限于单色照明区域。
偏置斜坡，用于自动确定准绝对EQE测量的正确偏置光强度
仅在一次波长扫描中。该程序对于检查太阳能电池的线性度也是有用的。
在具有BaSO 4涂覆的积分球的2×2cm 2面积的8°倾斜光束下测量反射率。
在不同条件下进行一系列测量的批处理模式。
太阳能电池保持在温度控制的真空吸盘（25°C）上，可以通过电动机移动
x-y-z阶段。直接在太阳能电池背面测量温度。
跨阻抗放大器（最大200 mA）可将太阳能电池保持在远程感应的短路状态
和联系质量检查。
自动校准EQE和反射率

- 提高吞吐量并减少操作员交互所需的时间。
- 使操作更安全，防止人为错误（错位，偏光等）。
- 通过手动处理避免参考太阳能电池的劣化。
EQE和反射测量之间的电动触点设置和转换。
通过与分析电学和光学模型的比较进行数据分析。
持续时间：

- 约1秒。用于点测量的每波长（2 x2cm²）
- 约9秒每波长为12.5 x 12.5平方厘米的太阳能电池
- 约12秒每波长为15.6 x 15.6平方厘米的太阳能电池
具有聚焦光斑（QMAP）的EQE和反射率映射
每个地图和波长的15.6 x 15.6平方厘米的细胞在5分钟内。

Spectral quantum efficiency
& reflectance

This tool is designed for the automated IQE analysis of
crystalline silicon solar cells. Some features are:

• The solar cells are illuminated with variable light, either homogeneously over an area of 20 x 20 mm,
  or with a focussed spot of approx. 1 x 3 mm².
• Full area EQE & reflectance measurements by moving the 4 cm² illuminated area continuously.
• Monochromatic light between 280-1600 nm from monochromator (2 gratings, slit width and order filter changed automatically). Typically used bandwidth is 8 nm FWHM and the wavelength accuracy is 1 nm.
• White bias light up to 1.2 suns is restricted to the area of monochromatic illumination.
• Bias-ramp for automatic determination of the correct bias light intensity for quasi-absolute EQE measurements
  in only one wavelength scan. The procedure is also useful to check the linearity of the solar cell.
• The reflectance is measured under an 8° tilted beam of 2 x 2 cm² area with a BaSO₄-coated integrating sphere.
• Batch mode for series of measurements under different conditions.
• The solar cells are held on a temperature controlled vacuum chuck (25 °C) which can be moved by a motorized
  x-y-z stage. The temperature is measured directly at the back of the solar cell.
• Transimpedance amplifier (max. 200 mA) holds solar cell at short circuit with remote sense 
  and contact quality check.
• Automatic calibration of EQE and reflectance
  
  • –  increases throughput and reduces the necessary time of operator interaction.
  • –  makes the operation safer against human errors (misalignment, bias light, etc).
  • –  avoids degradation of the reference solar cell by manual handling.
• Motorized contact-setting and change-over between EQE and reflectance measurements.
• Data analysis by comparison with analytical electrical and optical model.
• Duration:
  
  • –  ca. 1 sec. per wavelength for spot measurement (2 x 2 cm²)
  • –  ca. 9 sec. per wavelength for 12.5 x 12.5 cm² solar cell
  • –  ca. 12 sec. per wavelength for 15.6 x 15.6 cm² solar cell

   

• EQE and reflectance mapping with focussed light spot (QMAP)
  within 5 min for a 15.6 x 15.6 cm² cell per map and wavelength.