| Autor: |
Stoica I; Department of Physical Chemistry of Polymers, 'Petru Poni' Institute of Macromolecular Chemistry, 700487 Iasi, Romania., Albu RM; Department of Physical Chemistry of Polymers, 'Petru Poni' Institute of Macromolecular Chemistry, 700487 Iasi, Romania., Hulubei C; Department of Physical Chemistry of Polymers, 'Petru Poni' Institute of Macromolecular Chemistry, 700487 Iasi, Romania., Astanei DG; Faculty of Electrical Engineering, 'Gheorghe Asachi' Technical University of Iasi, 700050 Iasi, Romania., Burlica R; Faculty of Electrical Engineering, 'Gheorghe Asachi' Technical University of Iasi, 700050 Iasi, Romania., Mersal GAM; Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia., Seaf Elnasr TA; Department of Chemistry, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia., Barzic AI; Department of Physical Chemistry of Polymers, 'Petru Poni' Institute of Macromolecular Chemistry, 700487 Iasi, Romania., Elnaggar AY; Department of Food Science and Nutrition, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia. |
| Abstrakt: |
The efficiency of photovoltaics (PVs) is related to cover material properties and light management in upper layers of the device. This article investigates new polyimide (PI) covers for PVs that enable light trapping through their induced surface texture. The latter is attained via a novel strategy that involves multi-directional rubbing followed by plasma exposure. Atomic force microscopy (AFM) is utilized to clarify the outcome of the proposed light-trapping approach. Since a deep clarification of either random or periodic surface morphology is responsible for the desired light capturing in solar cells, the elaborated texturing procedure generates a balance among both discussed aspects. Multidirectional surface abrasion with sand paper on pre-defined directions of the PI films reveals some relevant modifications regarding both surface morphology and the resulted degree of anisotropy. The illuminance experiments are performed to examine if the created surface texture is suitable for proper light propagation through the studied PI covers. The adhesion among the upper layers of the PV, namely the PI and transparent electrode, is evaluated. The correlation between the results of these analyses helps to identify not only adequate polymer shielding materials, but also to understand the chemical structure response to new design routes for light-trapping, which might significantly contribute to an enhanced conversion efficiency of the PV devices. |
