The laser irradiation effect of three-junction GaAs solar cell arrays was studied through the experiment of fiber laser irradiation under different irradiation time and power density. The photocurrent voltage characteristics of solar array before and after laser irradiation were tested, The dark current voltage characteristics and spectral response of each solar cell array after irradiation were tested. The test and analysis results reveal that, The radiation damage of continuous laser to the array, due to the uneven energy distribution of the laser spot, the damage degree at different positions of the array is different. The damage of a single battery varies greatly, ranging from slight damage to complete failure. In the area with medium or strong laser power, continuous laser first damages the first and second junctions corresponding to the top cell and the middle cell, while the third junction corresponding to the bottom cell has less influence; In the area with weak laser power, the damage to the battery interior caused by continuous laser starts from the bottom battery with the smallest band gap, followed by the top battery and the middle battery.
In the simulated vacuum environment of low-temperature and low-pressure, a continuous laser irradiation effect experiment of 1070 nm was carried out on a carbon fiber composite sandwich structure with white paint on the surface of the reflector antenna using a fiber laser as the light source and the morphology characteristics of sandwich structures under different laser loading conditions were obtained. The transient temperature field on the surface of the sandwich was measured by a high temperature infrared imager, and the surface temperature rise of the sandwich was obtained by thermocouple. The relationship between temperature and damage morphology of structural materials was obtained by analyzing the changes of surface temperature field and morphology during laser irradiation. The mechanism of laser action on the sandwich structure of carbon fiber composite and the influence of laser parameters on the morphology of structural materials were studied. The results show that under laser irradiation with a laser power density of about 20 W/cm2, the white paint sprayed on the surface of the front skin first ablates and falls off. As the temperature rises, the resin base of the carbon fiber composite is pyrolyzed, the carbon fiber spallation occurs, the front skin loses its mechanical properties, the rubber film is pyrolyzed, the front skin is separated from the aluminum honeycomb, and the back skin expands and deforms under the action of pyrolysis gas.
Silver nanowires combine excellent conductivity, low surface resistance, high transparency, and good ductility, and have been widely studied and applied to fabrication of many micro-/nanoscale optoelectronic devices, such as transparent conductive films, microelectronic devices, thin-film solar cells, microelectrodes, and biosensors. To obtain the damage and photoelectric characteristics of micro-/nanoscale optoelectronic devices under laser irradiation, and thus to improve their laser-irradiation tolerance and expand applications in strong light-irradiation environments, in this paper, through experiments and theoretical calculations, we studied the laser-induced damage thresholds and damage-induced changes in the photoelectric characteristics of silver nanowires of different diameters exposed to single-pulse laser irradiation at wavelengths of 355, 532, and 1064 nm. Results show that the larger the diameter of silver nanowires, the higher the laser-induced damage threshold. Silver nanowires have the lowest damage threshold when irradiated by a 355-nm laser. The damage thresholds of silver nanowires with diameters of 20 and 40 nm are 0.22 and 1.35 J/cm2 , respectively. We have found that when the laser energies are higher than the damage thresholds, melting and fracturing occur at the wire ends and at the strong electric field distribution "node" sites of the silver nanowires, and the sample’s optical absorption rate and sheet resistance also increase. Such degradation of photoelectric performance can affect the absorptivity and conductivity of micro-/nanoscale optoelectronic devices, resulting in the degradation of device performance. The study provides new information for the development and application of micro-/nanoscale optoelectronic devices under strong laser-irradiation conditions.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.