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Transient Photo-Current and Tansient Photo-Voltage Tester for Perovskite Solar Cells

TPCV
The mechanism of TPC and TPV in solar cells

This system is designed to measure the transient photocurrent and photo-voltage of solar cells over time to analyze the transport mechanisms of photogenerated charge carriers and obtain the Charge Transfer Lifetime (from TPC) and Charge Recombination Lifetime (from TPV). By using a fast laser source, the system can irradiate the photovoltaic device to generate photocurrent or photo-voltage signals and perform time-domain measurement and analysis to obtain the curves of transient photo-voltage (TPV) and transient photocurrent over time, which can be used to understand the internal structure and charge carrier dynamics of the photovoltaic device.

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Features

Time Resolution
Signal-To-Noise Ratio
Software

System Design

TPC/TPV _ TPC/TPV Tester for Perovskite Solar Cells System Design01
TPC/TPV _ TPC/TPV Tester for Perovskite Solar Cells System Design

Specification

  • The laser module system wavelength is selectable (405nm, 520nm, 635nm, 940nm)
  • Rise time < 5ns
  • Fall time < 5ns
  • Laser light guiding and fiber optic coupling components
  • Photocurrent signal acquisition device
  • Maximum measurement bandwidth: 350MHz (-3dB)
  • Time resolution (Rise time): <1.15 ns
  • Record length: 25k
  • Sampling rate: 5GSa/s
  • Measurement voltage range: 2mV/div~ 5V/div
  • Time range: 1 ns/div and 100 s/div
  • Arbitrary waveform generator
  • Maximum modulation frequency 15MHz
  • Basic waveform output: sine wave, square wave, pulse wave, ramp wave, DC
  • Waveform output voltage 20mVpp~5Vpp (HighZ), 14bits resolution.

Application

Perovskite Solar Cell

TPC/TPV _ TPC/TPV Tester for Perovskite Solar Cells Application Perovskite Solar Cel 1

OPV

TPC/TPV _ TPC/TPV Tester for Perovskite Solar Cells Application OPV.01
TPC/TPV _ TPC/TPV Tester for Perovskite Solar Cells Application OPV.02

The Importance of understanding and measuring TPC and TPV

TPC

a. Understanding: The generation and collection of light-generated carriers

b. Influence:

  1.internal resistance

  2.Carrier recombination

  3.Carrier diffusion

c. Improving: Solar cell Jsc performance

TPV

a. Understanding: Light-generated charge carriers separation mechanism.
b. Influence:
  1. Bandgap of active layer
  2. Doping levels
  3. Interface quality
c. Improving: Solar cell Voc performance

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FAQ

What are TPC and TPV?

TPC: Transient PhotoCurrent

TPC affects the overall efficiency of the solar cell by impacting the rate at which light-generated charge carriers can be collected by the electrodes. A slow rate of carrier collection can lead to significant losses due to recombination and diffusion. By measuring TPC, it is possible to determine the internal resistance of the cell and to identify areas for improvement in the collection of light-generated charges.

TPV: Transient PhotoVoltage

TPV affects the efficiency of the solar cell by impacting the separation of light-generated charge carriers. A low TPV can indicate poor quality of the p-n junction, low doping levels, or a bandgap that is not well matched to the spectral response of the solar cell. By measuring TPV, it is possible to gain insights into the quality of the p-n junction and to identify areas for improvement in the separation of light-generated charges.

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