量子效率測量系統
描述
量子效率測量系統是一套完整的太陽能電池光譜反應研究實驗裝置。樣品由單色儀產生的單色光束照射，入口處有兩種光源：氙燈和鹵素燈。兩種光源的波長範圍涵蓋紫外光、可見光和紅外光。儀器具有背景光( BIAS Light ) 延伸功能，可利用額外的氙燈與空氣質量濾波器所產生的標準化 AM1.5G 白光激發樣品。被檢測的電池放置在電動真空 XY 工作平台上，並可手動進行 Z 移動。測量是在隔絕環境光線和外部電磁場的室內進行。入射光強度由雙頻 Si/InGaAs 光電二極體監控。所有系統組件都是全自動化，透過軟體控制。
- I-V 特性
- 照明下的開路電位 (OCP)
- 光譜反射系數 (R)
- 光譜透射係數 (T)
- 外部量子效率 (EQE 或 IPCE)
- 內部量子效率 (IQE 或 APCE)
- 短路電流密度 (Jsc)
- 填充因子
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QE 測量工作站模組
系統包括 ：
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| 樣品室內部 |  |
光電流量測/反射通量量測/內建光電二極體用於透射通量量測 |
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- 總波長範圍：200 ÷ 1650 nm
- 樣品上可調整的白光光束強度：0.01 ÷ 0.1 W/cm²
- 照明均勻度：10%
- 150 W 氙氣燈
- 水冷系統
- 低電磁輻射點火器
- 穩定模式：
- 電流穩定（失真< 1%）
- 電力穩定
- 光強度穩定（在實驗過程中提供恆定樣品照明的獨特解決方案）
- 樣品上的最大輻射強度：35 mW/cm2
- 鹵素燈泡功率：150 W
- 反射器類型：橢圓形
- 空氣冷卻系統
- 轉盤上有三個光柵，每個光柵針對不同波長範圍進行最佳化
- 根據波長選擇自動切換光柵
- 透過軟體控制的電動輸出與輸入狹縫
- 透過軟體切換不同光源的兩個輸入狭縫
- 入口與輸出光柵開啟範圍： 0 ÷ 5 mm
- 電動內部快門，可完全切斷光束
- 最大光譜解析度： 最大光譜解析度：0.1 nm（取決於輸入與輸出狭縫寬度）
- 輸出端斬波器
- 放置在樣品室入口處
- 最多 6 個濾光片
- 預設提供兩個邊緣 (長通) 濾光片：400 nm 和 600 nm
- 雙波段 Si/InGaAs 光電二極體用於監測入射光強度、穿過樣品的通量和樣品反射的通量
- 偏壓電位範圍：-5 V ÷ 5 V
- 電流範圍 1 µA、10 µA、100 µA、1 mA、10 mA、100 mA
- 電流解析度：1 pA 至 100 nA (依範圍而定)
- 最大取樣率： 1 kSample/s
- 與電腦連接：透過 USB 2.0
- 同時處理兩個光電二極體輸入 (參考光電二極體和反射光電二極體/透射光電二極體)
- 直流與交流量測模式
- 輸入增益：x1、x2、x4、x8、x12
- 積分時間：1 ms ÷ 10 s
- 最大樣品尺寸： 20 x 20 cm
- 手動放置於樣品任何一點的接觸電極
- 金塗層
- Z 軸的移動範圍：12 mm (手動)
- 移動精確度：0.01 mm
- 內建偵測器，可偵測透射光
- 光電流量測用的可調式接觸針腳、
- 內建真空泵，可保持樣品在穩定的位置
The Quantum Efficiency Measurement Station is a complete experimental setup for solar cells spectral response investigation. The sample is illuminated with a monochromatic beam produced by the Monochromator with two types of light sources at the entrance: Xenon Lamp and Halogen Lamp. Both lamps provides wavelengths range that covers UV, VIS and IR light. Instrument with the BIAS Light extension enables to excite the sample with a normalized white AM1.5G light from an additional Xenon Lamp combined with the Air Mass Filter. The examined cell is placed on a motorized vacuum XY Table, with a manual Z shift. Measurements are performed in a chamber that screens the setup from ambient light and external EM fields. The incident light intensity, is monitored with a Dual Band Si/InGaAs Photodiode. All the system components are fully automated, controlled via software.
Quantities measured by the instrument:
- I-V characteristics,
- Open Circuit Potential (OCP) under illumination,
- Spectral reflection coefficient (R),
- Spectral transmission coefficient (T),
Characteristics:
- External quantum efficiency (EQE or IPCE),
- Internal quantum efficiency (IQE or APCE),
- Short-circuit current density (Jsc),
- Fill Factor.
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QE Measurement Station modules
The system consists of:
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| Sample Chamber interior | |
| Photocurrent measurement/ Reflected flux measurement/ Built-in photodiode for Transmitted flux measurement |
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Specifications
Instrument performance may be tailored to the certain requirements..
General
- Total wavelengths range: 200 ÷ 1650 nm,
- Adjustable white light beam intensity on the sample: 0.01 ÷ 0.1 W/cm²,
- Illumination homogeneity: 10%,
Xenon Lamp
- 150 W xenon burner,
- Water cooling system,
- Low EM emission igniter,
- Stabilization modes:
- electric current stabilization (distortions < 1%),
- electric power stabilization,
- light intensity stabilization (unique solution to provide constant sample illumination during the experiment),
- Maximum radiation intensity on the sample: 35 mW/cm2
Halogen Lamp
- Electrical power of halogen bulb: 150 W,
- Reflector type: elliptic,
- Air cooling system,
Monochromator
- Three gratings on the turret, each optimized for different wavelengths range,
- Automated grating switching depending on the wavelength selection,
- Motorized output and input slits, controlled via software,
- Two input slits for different light sources, switched via software,
- Entrance and output slit opening range: 0 ÷ 5 mm,
- Motorized internal shutter, that provides full cut off of the light beam,
- Maximal spectral resolution: 0.1 nm (depends on the input and output slits width),
- Chopper at the output,
Filter Changer
- Placed at the Sample Chamber entrance,
- Up to 6 filters,
- Two edge (long pass) filters provided by default: 400 nm and 600 nm,
Detectors
- Dual Band Si/InGaAs Photodiodes are used to monitor the incident light intensity, the flux transmitted through the sample and the flux reflected by the sample.
Lockin
- Bias potential range: -5 V ÷ 5 V,
- Current ranges: 1 µA, 10 µA, 100 µA, 1 mA, 10 mA, 100 mA,
- Current resolution: from 1 pA to 100 nA (range dependent),
- Maximum sampling rate: 1 kSample/s,
- Connection with PC: via USB 2.0,
- Two photodiodes inputs handled simultaneously (Reference Photodiode and Reflectance Photodiode/Transmittance Photodiode),
- DC and AC measurement mode,
- Input gain: x1, x2, x4, x8, x12,
- Integration time: 1 ms ÷ 10 s.
Motorized Multi-Axis Vacuum Table
- Maximum sample dimensions: 20 x 20 cm,
- Contact electrodes placed manually at any point of the sample,
- Golden coating,
- Movement range for Z axis: 12 mm (manual),
- Movement precision: 0.01 mm,
- Built-in detector for transmitted light detection,
- Adjustable contact pins for photocurrent measurements,
- Vacuum pump integrated to keep the sample in stable position.
