Quantum Efficiency/ Spectral Response/ IPCE Measurement System

Model : QE-R

Designed in accordance with IEC 60904-1, 60904-7, 60904-8

  ● Can measure Spectral Response and External Quantum Efficiency.
  ● White Light Bias Intensity can reach 0 to 3 solar constants (The same grade as Fraunhofer ISE).
  ● Automatic zero-bias function provides a stable short-circuit condition for the solar cell under testing.
  ● Integrated system, easy to operate or install.
  ● Auto band-gap calculation, provides critical material characteristics. 
  ● The system can provide customers the most accurate correction parameters by calculating mismatch factor.
  ● Provides the most accurate calculation of the whole spectrum short-circuit current density by auto-interlace method.
  ● Short-circuit current density spectrum can be the reference for material analysis and process improvement.
  ● Provides IQE calculation function. Customers can input the reflectivity of the device to obtain the IQE information.

High-efficiency light elliptical reflector:

  ● Light collection efficiency > 70 %
  ● Provides accurate and stable measurement.

Czerny-Turner multi-diffraction gratings monochromator: 

  ● Low stray light <10-5
  ● High stability and fast scan rate. 
  ● Spectral range can reach 200 nm ~ 2000 nm.

Dual-beam optical design:

  ● The same design as NIM, NIST and PTB.
  ● Monitors the light intensity while acquiring the current signal, which ensures the measurement accuracy. 

Signal multiplexer:

  ● QE-R integrates computer-controlled signal switching multiplexer. 
  ● Helps customers reduce wiring errors.

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

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

Optional Model Optional Item Specifications
QE-R-RCG3018 EQE Measurement Extend to 1800 nm a. EQE measurement for NIR range
b. Standard Ge detector for 900-1800 nm
c. System wavelength range: 300-1800 nm
d. Lock-in channel for Ge detector
e. With calibration report
f. Software for NIR range
QE-R-IS3011 Internal Quantum Efficiency Measurement Function a. 2” integrating sphere with barium sulfide coating material
b. Integrating sphere aperture: 1.4 cm
c. Incident angle: 8°
d. IQE and EQE can be measured at the same point
e. Reflectivity and internal quantum efficiency measurement function
f. Measurement range: 300-1100 nm
g. Si detector
h. Standard reflection white board with traceable report
i. Average repeatability ≧±99 %
j. Illumination area: same size as EQE
k. Si detector has response up to 1150 nm
(the calibration traceable report is from 300-1100 nm, above 1100 nm, we need to upgrade to wider range spectrum as 1800 nm)
QE-R-IS3018 Internal Quantum Efficiency Measurement Function a. 2” integrating sphere with barium sulfide coating material
b. Integrating sphere aperture: 1.4 cm
c. Incident angle: 8°
d. IQE and EQE can be measured at the same point
e. Reflectivity and internal quantum efficiency measurement function
f. Measurement range: 300-1800 nm
g. Si/Ge detector
h. Standard reflection white board with traceable report
i. Average repeatability ≧±99 %
j. Illumination area: same size as EQE
QE-R-T Transmission Measurement Function a. Provide the customized holder for transmittance measurement around the center area of sample under test
b. Integrating sphere mode
c. Measurement wavelength is similar to IQE
d. Light spot is similar to EQE
QE-R-DC DC Mode a. DC mode
b. Mechanical switcher bar and users can change from AC mode to DC mode in 1 second
c. DC mode software
d. Measurement delay setting
e. Support multiple acquisition and average
f. Instant data display
g. Active low-frequency pass filter @ 1k Hz
h. Default Gain setting: >106
i. Acquisition precision >14 bit
j. Acquisition speed > 50 us per point
k. Max acquisition points >10,000
l. The repeatability ≧±99 %
QE-R-DL Dual-lamp System a. 75 W Xe and 150 W QTH lamp
b. Current instability: Xe< 0.5%, QTH<0.1%
c. Wavelength range: 300-1800 nm (EQE and IQE)
d. Highly efficient and high reflectivity elliptical reflector system
e. Can provide continuous spectrum from 300-2500 nm
f. Switching mechanism for dual lamp system
g. Switching distance: 75 mm
h. Switching resolution: ±0.05 mm
i. Switching speed: 10~200 mm/s
j. Lamp timer
QE-R-B0505 Minimized Beam Size Module a. Irradiance area: 0.5 mm x 0.5 mm square
b. Optical lens
c. Signal amplifier circuit
d. Secondary magnification ability
QE-R-VB05 Voltage Bias Function a. Voltage bias: 0-±5 V
b. Resolution: 1.22 mV
c. Software setup function
QE-R-VB10 Voltage Bias Function a. Voltage bias:0-±10 V
b. Resolution: 1.22 mV
c. Software setup function
QE-R-LB White Light Bias Module a. 150 W halogen lamp
b. 0-2 Sun intensity, adjustable
c. 1 m fiber
d. Optical lens and mount
e. X axis sliding stage with magnet
f. Safety interlock
g. Cooling system: air cooling
QE-R-DJ Double-junction Measurement Module a. 150 W halogen lamp
b. 0-5 Sun intensity, adjustable
c. 1 m fiber
d. Optical lens and holder
e. X axis sliding stage with magnet
f. Safety interlock
g. Cooling system: air cooling
h. Two filters: 550 nm, 700 nm
i. Double-junction measurement software
QE-ST-SI Conductive Plate Sample Stage a. 6” standard gold-plated measurement stage
b. Vacuum absorption function
c. 7 L/min vacuum pump
d. Z axis probe *2
e. Needle tip:0.5 mm
f. Platform for reference cell
g. Adjustable balance leg*4, adjustable range: 30 mm
h. BNC connecter
QE-ST-OP Sample Stage for Thin Film a. Standard sample stage for thin film
b. IC clip * 1
c. Three axis micropositioner, distance: ±3 mm, resolution: 0.01 mm, can load 10 Kg (maximum)
d. Resolution: 10 um
e. Platform for placing detector
f. 6-channel knob
g. Can support 6 sub-cell (maximum), the distance of each cell should be 2.54 mm
QE-ST-DS Multifunction Thin Film Sample Stage a. Multifunction thin film sample stage
b. IC clip * 2
c. Can measure unilateral sample and bilateral sample
d. Platform for placing detector
e. 6-channel knob
f. Adjustable balance leg* 4, height can be adjustable
g. Can support 6 sub-cell (maximum), the distance of each cell should be 2.54 mm
QE-BT-BOX Back Contact Probe Sample Box a. Back contact probe sample box
b. 0.475 mm round needle tip spring probe
c. Spring probe range: 2mm
d. Upper cover with magnet
e. Customized probe position
f. Can support the sample size: 20 mm (L) x 20 mm (W) x 2 mm (H) (maximum)
g. Can support 6 sub-cell (maximum)
QE-ST-FL Flip Stage a. The stage platform can rotate 180 degree
b. Z axis probe* 2
c. Sample size should less than 2.5 cm x 2.5 cm
QE-R-FB Optical Fiber Illumination Module a. Measurement range: 300-1100 nm
b. Fiber switching bar for user to change the light direction
c. 4.5 meters fiber
d. Fiber condensing lens
e. Illumination area: 1 mm (diameter)
f. Fiber mount
QE-R-GI Glove Box Integration Kit a. Measurement range: 300-1100 nm
b. Fiber switching mechanism. EQE can be tested in the glove box and outside the glove box
c. 4.5 meters fiber
d. KF40 seal flange
e. Fiber condensing lens
f. Illumination area: 1mm (diameter)
g. Light direction from top to bottom
h. Sample stage for the glove box with BNC connector, IC clip and mount for fiber installation
i. Sample channel switch box
j. Black cloth to avoid the stray light
k. XY axis sliding stage
l. XY axis move range is ±12.5 mm, accuracy: 0.01 mm
m. BNC signal connecter
QE-R-mapping Auto-mapping scanning function a. XY axis auto-mapping stage
b. XY axis range: ±100 mm
c. Accuracy: ±0.02 mm
d. Resolution: 2.5 μm
e. Movement mode: auto control
f. Safety protection device
g. Automatic light intensity calibration
h. LBIC measurement function, 2D and 3D display
i. LBIC measurement time: 0.25 S/point
j. Repeatability >±2 %
k. Multi-position EQE, IQE measurement function
l. Multi-position coordinates pre-setup function
m. Stage pre-move function
QE-R-MJ LED Multi-junction Solar Cell Measurement Module a. 4 high light intensity LED light bias
b. Automatic software
c. 4 independent channel controller
d. RS232 communication interface
e. Over current and over voltage protection
f. Constant current control mode
g. Input current: 800 mA/Channel
h. Tandem junction automatic measurement function
i. 150 W halogen light bias
j. 1 m fiber
k. Optical lens and holder
l. Long pass filter
QE-R-LUP Upward Light Direction Test Function a. Upward light direction mode
b. Upward/ downward switching knob
c. Banana signal channel
d. Z axis probe* 2

● 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.

The comparison with different structure’s HIT Solar Cell by QE-R.

For various types of solar cells measurement. 
Measuring the EQE of Triple Junction Solar Cell by QE-R.

Measuring the EQE of Silicon base Triple Junction Solar Cell by QE-R.

Measuring Solar Cell by QE-R is with slighter difference.

Coming soon!

Latest 10 publications referencing QE-R

Interfacial Engineering via Inserting Functionalized Water-soluble Fullerene Derivative Interlayers for Enhancing Performance of Perovskite Solar Cells

Tiantian Cao, Peng Huang, Kaicheng Zhang, Ziqi Sun, Kai Zhu, Ligang Yuan, Kang Chen, Ning Chen and  Yongfang Li

Journal of Materials Chemistry A, Issue 8, 2018

Seeded Space‐Limited Crystallization of CH3NH3PbI3 Single‐Crystal Plates for Perovskite Solar Cells

Hong‐Lin Yue, Hsin‐Hung Sung and Fang‐Chung Chen

Advanced Electronic Materials

Photovoltaic Performance Enhancement of Silicon Solar Cells Based on Combined Ratios of Three Species of Europium-Doped Phosphors

Ho WJ, You BJ, Liu JJ, Bai WB, Syu HJ and Lin CF

Materials, 2018 May 18;11(5)

Synergistic improvement of perovskite film quality for efficient solar cells via multiple chloride salt additives

Pengyang Wang, Qi Jiang, Yang Zhao, Yong Chen, Zema Chu, Xingwang Zhang, Yuqin Zhou and Jingbi You

Science Bulletin, Available online 9 May 2018

Related to: SS-F5-3A

A narrow-bandgap donor polymer for highly efficient as-cast non-fullerene polymer solar cells with a high open circuit voltage

Chunmei Chang, Wanbin Li, Xia Guo, Bing Guo, Chennan Ye, Wenyan Su, Qunping Fan and Maojie Zhang

Organic Electronics, Volume 58, July 2018, Pages 82-87

Related to: SS-F5-3A

Bright prospect of using alcohol-soluble Nb2O5 as anode buffer layer for efficient polymer solar cells based on fullerene and non-fullerene acceptors

Yiming Bai, Bo Yang, Fuzhi Wang, Huiyun Liu, Tasawar Hayat, Ahmed Alsaedi and Zhan'aoTan

Organic Electronics, Volume 52, January 2018, Pages 323-328

Microstructures, optical and photovoltaic properties of CH3NH3PbI3(1-x)Clx perovskite films with CuSCN additive

Yasuhiro Shirahata and Takeo Oku

Materials Research Express, Volume 5, Number 5

Nitrogen and sulfur dual-doped chitin-derived carbon/graphene composites as effective metal-free electrocatalysts for dye sensitized solar cells

Yi Di, Zhanhai Xiao, Xiaoshuang Yan, Geying Ru, Bing Chen, Jiwen Feng

Applied Surface Science, Volume 441, 31 May 2018, Pages 807-815

Inverted planar organic-inorganic hybrid perovskite solar cells with NiOx hole-transport layers as light-in window

Wei Chen, Yinghui Wu, Bao Tu, Fangzhou Liu, Aleksandra B. Djurišić, Zhubing He

Applied Surface Science, available online 30 April 2018

Effects of halide addition to arsenic-doped perovskite photovoltaic devices

Tsuyoshi Hamatani and Takeo Oku

AIP Conference Proceedings, Volume 1929, Issue 1

Coming soon!

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