Evaluation of micrometer scale lateral fluctuations of transport properties in CIGS solar cells

  title={Evaluation of micrometer scale lateral fluctuations of transport properties in CIGS solar cells},
  author={Amaury Delamarre and Daniel Ory and Myriam Paire and D. Lincot and Jean‐François Guillemoles and Laurent Lombez},
  booktitle={Photonics West - Optoelectronic Materials and Devices},
CIGS is a material showing high efficiencies in photovoltaic devices although numerous questions remain about its physical mechanisms. Among them is the influence of the polycrystalline nature on global efficiencies. In order to study the spatial fluctuations of the optoelectronic parameters, two original setups are developed. Firstly a Hyperspectral Imager is used to investigate spectrally resolved luminescence images. It is also possible to calibrate it in absolute values, which means that… 
Quantitative optical measurement of chemical potentials in intermediate band solar cells
Abstract. Having shown some demonstration of two photon absorption and multiband emission processes in quantum dots (QD), multiquantum wells (MQW), and highly mismatched alloys, intermediate band
Quantitative luminescence mapping of Cu(In, Ga)Se2 thin‐film solar cells
We investigate photoluminescence and electroluminescence (PL and EL) emission images from Cu(In,Ga)Se2-based solar cells by means of a Hyperspectral Imager. Using the generalized Planck's law, maps
Deciphering the Origins of P1-Induced Power Losses in Cu(In Ga1–)Se2 (CIGS) Modules Through Hyperspectral Luminescence
Abstract In this report, we show that hyperspectral high-resolution photoluminescence mapping is a powerful tool for the selection and optimization of the laser ablation processes used for the
Thin film microcells for concentrated applications
Miniaturizing concentrator cells is beneficial for heat and spreading resistance losses management. With III-V materials, solar cells cannot be designed much less than 0.1 mm2 due to edge


Characterization of solar cells using electroluminescence and photoluminescence hyperspectral images
We analyze photoluminescence (PL) and electroluminescence (EL) using a hyperspectral imager that records spectrally resolved luminescence images of a GaAs solar cell. Thanks to the absolute
Resistive and thermal scale effects for Cu(In, Ga)Se2 polycrystalline thin film microcells under concentration
Using solar cells under concentrated illumination is known to improve the conversion efficiency while diminishing the active area, and thus material consumption. Recent concentrator cell designs tend
Contactless mapping of saturation currents of solar cells by photoluminescence
We report in this letter the contactless measurement of spatially resolved photocurrent–photovoltage relationship. The method is based on hyperspectral imaging, from which we record cartography of
Evaluating the electrical properties of silicon wafer solar cells using hyperspectral imaging of luminescence
A line-imaging spectrometer is used to collect the spectrum of electroluminescence at each point of a multicrystalline silicon wafer solar cell. Characterization of the diffusion lengths of minority
Electroluminescence analysis of high efficiency Cu(In,Ga)Se2 solar cells
We compare the electroluminescence (EL) of polycrystalline ZnO∕CdS∕Cu(In,Ga)Se2 heterojunction solar cells with similar band gaps but different open circuit voltages, indicating a difference in the
Spectrally resolved photoluminescence studies on Cu(In,Ga)Se2 solar cells with lateral submicron resolution
We have analyzed thin film glass/Mo/Cu(In 1-x ,Ga x )Se 2 /CdS/ZnO solar cells (x=0.3-0.5) and samples without the ZnO layer in a confocal scanning microscope setup with lateral submicron resolution
Cathodoluminescence of Cu(In,Ga)Se2 thin films used in high-efficiency solar cells
Cathodoluminescence spectroscopy and spectrum imaging are employed to investigate Cu(In,Ga)Se2 (CIGS) thin films used in high-efficiency solar cells. We have found a nonuniform spatial distribution
Modeling of spatially inhomogeneous solar cells by a multi-diode approach
An equivalent circuit model consisting of parallel connected diodes with different electronic quality simulates the electronic properties of solar cells with spatially inhomogeneous material quality.
Spectral and spatially resolved imaging of photoluminescence in multicrystalline silicon wafers
The photoluminescent properties of multicrystalline silicon wafers have been studied using hyperspectral imaging in the region 900–1700 nm. Hyperspectral imaging provides high resolution macroscopic
Depletion-Layer Photoeffects in Semiconductors
The theory of photoconduction through the reverse-biased $p\ensuremath{-}n$ junction in semiconductors is developed without the customary assumption that carrier generation in the junction depletion