Model QE-R - Quantum Efficiency/ Spectral Response/ IPCE Measurement System

• Quantum Efficiency Measurement System :
• Wavelength range：300-1100 nm (can be extended)
• Repeatability:
• From 300 to 390 nm is ≧±99.4 %
• From 400 to 1000 nm is ≧±99.6 %
• The other wavelength ≧±99 %
• The repeatability of short-circuit current density is ≧±99.6 %
• The repeatability= 100% * (max - min)/(max + min)
• Measurement time: less than 3 minutes from 300-1100 nm (scan interval: 10 nm)
• Shielding Enclosure: 60 cm
• Lamp System :
• 75 W Xe
• Wavelength range: 250-1800 nm (EQE and IQE)
• Highly efficient and high reflectivity elliptical reflector system
• Can provide continuous spectrum from 300-2500 nm
• Switching mechanism for dual lamp system
• Switching distance: 75 mm
• Switching resolution: ±0.05 mm
• Switching speed: 10~200 mm/s
• Fluctuation: <0.1 % (Use the lock-in to get multi-point measurement result under 530 nm)
• Long term instability: <0.2% within 3 hours (Measure the silicon detector as the standard sample per hour and find the average value for full measurement range) (Average ( | EQE_3H – EQE_0H | / (3Hr) ) = stability (%/Hr)_average value)
• Lamp timer
• Monochromator :
• Czerny-Turner monochromator
• Focal length: ＜120 mm
• F/#: ≦3.9
• Stray light <10-5
• Wavelength resolution: ≦1%
• Scanning step: 0.1 nm-50 nm, normally 10 nm
• Optical System :
• Illumination light spot:
• 1 x 1 mm2 or 1 x 4 mm2
• 1.5 x 4 mm2
• 2 x 2 mm2
• adjustable
• Irradiation method: from the top to the bottom. Easy for place and measure the samples.
• Reflector Reflectivity: >75% for full wavelength range
• Monochromatic light intensity: 2 mW/cm2 @ 530 nm
• Incident angle: 8°
• Efficient working distance: >10 cm
• Chopper :
• Frequency: 10~450 Hz
• Can be controlled by computer
• Resolution: 0.01 Hz, stability: < ±0.05 Hz
• Stabilization period: <3 seconds
• Filter Wheel :
• Optical controlled filter wheel
• Can be controlled manually and automatically
• LED display to indicate the present filter setting position
• Equipped with 4 filters
• Lock-in Amplifier :
• Two DSP lock-in amplifiers
• Maximum acquisition speed <25 us (signal)
• Two DSP simultaneous working mode speed <50 us
• Time delay between two amplifiers <1 us
• Time constant: 0.001~100 sec, user setting
• Roll-off filter
• RXYθ measurement function
• Interface: USB
• Maximum gain: 107
• Maximum sensitivity: 1 nA
• Maximum input voltage: 10 V
• Bandpass filter function can filter the interfering signal automatically
• Automatic channel switch function
• Calibration Detector :
• Si detector 300-1100 nm
• BNC connector
• 10 x 10 mm2, non-uniformity: 5 ‰
• NIST traceable report
• Computer controlled detector channel
• Monitor Module :
• Standard monitoring module
• Monitoring range: similar to EQE wavelength range
• Lock-in amplifier for feedback circuit
• DSP lock-in input
• Immediate monitoring ability
• Software :
• Light intensity calibration
• Spectral response measurement and external quantum efficiency measurement
• Automatic and immediate short-circuit current density calculation
• Automatic short-circuit current calculation for single wavelength
• Internal quantum efficiency calculation software
• Band gap analysis
• Data collection and analysis function
• Spectral mismatch factor calculation
• Signal monitoring function
• Jsc Integration
• QE curve normalization
• TXT data saved formula
• Oscilloscope Module :
• Oscilloscope display window
• Ability of time domain signal and frequency domain signal analysis and displaying
• Maximum time domain: 10 S
• Signal monitoring function: can monitor the photon current variation of test sample
• Two independent channels for EQE and IQE
• Analog input resolution: 14 Bits (ADC: Analog Digital Converter)
• Maximum resolution of sampling rate: 48 KS/s
• Maximum voltage display: ±10 V, accuracy: 7.73 mV
• Minimum read current: 1 nA
• Computer :
• Computer with LCD monitor
• Official Windows 7
• RS232 communication port
• Shielding Enclosure :
• Compact system
• Shielding enclosure to avoid the stray light
• 60 cm operation space

• Exclusive two DSP dual-phase lock-in amplifiers, which monitors the optical power and measure the device signal simultaneously.
• Exclusive integrated computer-controlled signal switch can reduce cost for maintenance and consumables.
• High-efficiency light collection system exceeding 70% collecting rate and provides accurate and stable measurement.
• Czerny-Turner multi-gratings monochromator with low stray light ( < 10-5), provides precise and rapid measurement. 
• Stable lamp system for long testing time and less calibration time.
• High repeatability over 99.5 %
• For various types of solar cells measurement.

High-efficiency light elliptical reflector:

Czerny-Turner multi-diffraction gratings monochromator： 

Dual-beam optical design:

Signal multiplexer:

Signal-to-noise ratio can reach 100 dB, the result of the overall system optimization

DC mode function for DSSC solar cells

High uniformity detector