Semiconductor Physics, Quantum Electronics & Optoelectronics, 29 (3), P. 374-382 (2026).
DOI: https://doi.org/10.15407/spqeo29.03.374

Concentrator solar photoreceivers on thermally conductive aluminum–polyimide lacquer-foil dielectrics

V.M. Borshchov¹, O.M. Listratenko¹, M.A. Protsenko¹, I.T. Tymchuk¹, O.V. Kravchenko¹, I.V. Borshchov¹, M.I. Slipchenko², V.P. Kostylyov³

¹“Research and production enterprise “LTU” LLC, Kharkiv, Ukraine
²Institute for Scintillation Materials of the National Academy of Sciences of Ukraine, Kharkiv, Ukraine
³V. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
^*Corresponding author e-mail: vkost@isp.kiev.ua

Abstract. New approaches to creation of high-efficiency single concentrator photovoltaic (CPV) receivers by reducing their mass and cost by using thermally conductive aluminum boards have been introduced. Optimized combined printed circuit boards on rigid aluminum substrates with flexible multilayered thermally conductive composite polymer thermal interface dielectrics foiled with thin lightweight aluminum coatings have been developed. Dependences of maximal operation temperatures on combined boards on board size have been simulated using COMSOL MULTIPHYSICS software. Thermal properties of test quality structures (TQS) of single CPV receivers with improved thermal characteristics based on thermally conductive composite polyimide (PI) layers with the thermal conductivity of 1.0…3.0 W/(m·K) and novel high-efficiency concentrator triple-junction 3C44-type solar cells (SC) from AZUR SPACE Solar Power GmbH (Germany) with increased efficiency of about 43.6% at solar radiation concentration ratio of 500^× have been investigated. The electrical and mechanical properties of the improved combined printed circuit boards on aluminum substrates and more technological lacquer-foil aluminum-PI dielectrics with the average filled volume concentration of heat-conductive particles in thin PI layers of the order of 50 vol.%, which ensure operation temperatures of the single CPV receiver boards in the SC area of no more than 70–90 °C and allow maintaining high operational reliability and increasing operation life of the single CPV receivers under favorable operation conditions, have been investigated.

Keywords: CPV receivers, thermally conductive PI composite materials, thermally conductive aluminum-polyimide lacquer foil dielectrics, CPV receiver quality test structures.