Model : PECT-600

Boost Your submission! Using PECT-600 (FTPS) to characterize Voc loss mechanism of PSC (Perovskite Solar Cell) and OSC (Organic Solar Cell).

Highly Sensitive Fourier-Transform Photocurrent-Spectroscopy



Keywords: FTPS, Voc loss, PSC, OSC, OPV, Charge Transfer State, Perovskite tail state, halide segregation, Highly sensitive EQE, PV-EQE, Voc loss


 PECT-600 (FTPS) is the most sensitive photocurrent spectroscopy system. It is dedicated to probing tail states and charge transfer states of any kind of perovskite and organic solar cells, respectively. These spectral results facilitate analyzing loss of open circuit voltage (Voc) and enhance your scientific article quality for submitting to higher tier journals.

In semiconductor devices, defects are usually caused by non-ideal crystallization. Defects result in defect states or trap states in the middle of forbidden bandgap and affect the whole opto-electrical properties of devices. The signal intensities of these states are extremely weak due to their low absorption coefficients. Hence, probing and characterizing systems must be highly sensitive.

Being the most sensitive photocurrent spectrometer, PECT-600 is developed to probe ultra-low intensity absorption signals by using Fourier Transform data processing technique. Using PECT-600, coupled with customized software, to characterize defect states and charge transfer states within forbidden bandgap provides quantitatively analyzed results.


 Direct spectral evidence to improve paper submission quality:

 There are more than 50 published high-index journal papers adopt Fourier Transform data processing technique to analyze bandgap tail states and study Voc loss mechanism of new solar cell materials and devices.

 Accelerate scientific research efficiency by completing the turn-key solutions:

 The system is fully modulated. Assembling and adjusting optical paths are not required. Users can immediately start probing after quick installation. It can save at least two years of research time by avoiding arbitrary self constructing and rev up your laboratory’s research and papers.

 Comprehensive training on fundamental principles and analytical skills:

  Within a week after installation, our optical physics experts will provide fundamental module training and help measure and analyze the spectra of users’ samples. We teach our clients fundamental physical formulas, impart practical analysis skills and share spectroscopy manuscript writing experiences. (Unique service on the market)




Voc loss mechanism and charge transfer state study on 16% efficiency organic photovoltaic cells.

Keywords: OSC, organic solar cell, charge transfer stat, CTS, FTPS, Fourier Transform Photocurrent, PV-EQE, PECT-600, Voc loss, highly sensitive EQE


Over 16% efficiency organic photovoltaic cells enabled by a chlorinated acceptor with increased open-circuit voltages.

Yong Cui, Huifeng Yao, Jianqi Zhang, Tao Zhang, Yuming Wang, Ling Hong, Kaihu Xian, Bowei Xu, Shaoqing Zhang, Jing Peng, Zhixiang Wei, Feng Gao & Jianhui Hou

Nature Communications volume 10, 2515 (2019)

  In 2019, Dr. JH Hou’s group from ICCAS adopted Enlitech’s PECT-600 and REPS systems to study the mechanism of increased open-circuit voltage in 16% efficiency organic solar cell with chlorinated acceptor system. The authors report a chlorinated non-fullerene acceptor, which exhibits an extended NIR optical absorption and contributes to short-circuit photocurrent (from EQE spectrum measured by Enlitech’s QE-R system). This system also reveals a higher Voc, which was explored by highly sensitive PV-EQE and EL-EQE techniques (FTPS PECT-600 and REPS systems). The main reason of increased open-circuit voltage is due to the significant reduction in non-radiative decay loss (0.206 eV). Therefore, this chlorinated acceptor can simultaneously increase the short-circuit current density and the open-circuit voltage. The excellent result is published in Nature Communications.


  FTPS (s-EQE, PV-EQE) spectra (a) and Voc loss analysis (c)


Keywords: PSC, Perovskite, halide segregation, FTPS, Fourier Transform Photocurrent, PV-EQE, PECT-600, tandem solar cell, Voc loss,  highly sensitive EQE,


Revealing the origin of voltage loss in mixed-halide perovskite solar cells.

Suhas Mahesh, James M. Ball, Robert D. J. Oliver, David P. McMeekin, Pabitra K. Nayak, Michael B. Johnston and  Henry J. Snaith

Energy Environ. Sci., 2020,13, 258-267

  In 2020, Dr. Henry Snaith’s group from Oxford University used FTPS to study photo-induced halide segregation attributed to Voc loss in mixed-halide (Iodide-Bromide) perovskite. The experiment was conducted by using FTPS (s-EQE, PV-EQE) to probe tail state absorption of mixed-halide segregation in the bandgap. It quantitively compares calculated time evolution of mix-halide segregation induced Voc loss and measured time evolution of Voc to explore the dominant Voc loss mechanism of the cell.


  FTPS (s-EQE, PV-EQE) is utilized to detect and monitor the tail states by halide segregation generated by light bias conditions


1. Over 16% efficiency organic photovoltaic cells enabled by a chlorinated acceptor with increased open-circuit voltages.    Yong Cui, Huifeng Yao, Jianqi Zhang, Tao Zhang, Yuming Wang, Ling Hong, Kaihu Xian, Bowei Xu, Shaoqing Zhang, Jing Peng, Zhixiang Wei, Feng Gao & Jianhui Hou   Nature Communications, 2019, 2515

2. Wide-gap non-fullerene acceptor enabling high-performance organic photovoltaic cells for indoor applications.    Yong Cui, Yuming Wang, Jonas Bergqvist, Huifeng Yao, Ye Xu, Bowei Gao, Chenyi Yang, Shaoqing Zhang, Olle Inganäs, Feng Gao & Jianhui Hou    Nature Energy, 4, 768-775 (2019)

3. Reduced Nonradiative Energy Loss Caused by Aggregation of Nonfullerene Acceptor in Organic Solar Cells    Yunpeng Qin, Shaoqing Zhang,* Ye Xu, Long Ye, Yi Wu, Jingyi Kong, Bowei Xu, Huifeng Yao, Harald Ade, and Jianhui Hou*    Advanced Energy Materials, 2019, 1901823.

4. 14.7% Efficiency Organic Photovoltaic Cells Enabled by Active Materials with a Large Electrostatic Potential Difference.    Huifeng Yao, Yong Cui, Deping Qian, Carlito S. Ponseca, Jr., Alireza Honarfar, Ye Xu, Jingming Xin, Zhenyu Chen, Ling Hong, Bowei Gao, Runnan Yu, Yunfei Zu,  Wei Ma, Pavel Chabera, Tönu Pullerits, Arkady Yartsev, Feng Gao, and Jianhui Hou.    J. Am. Chem. Soc. 2019, 141, 19, 7743-7750

5.  Impoved Charge Transport and Reduced Nonradiative Energy Loss Enable Over 16% Efficiency in Ternary Polymer Solar Cells    Runnan Yu, Huifeng Yao, Yong Cui, Ling Hong, Chang He, Jianhui Hou    Advanced   Materials, 2019, 1902302