Light Management Investigation of Transparent DSSC based on Ln3+ ion doped BaO-ZnF2-B2O3-TeO2 Glass (Ln3+ = Dy3+/Sm3+/Eu3+) as UV Down-conversion Material L Yuliantini, I Paramudhita, L M Pranoto, Shobih, J Hidayat, N M Nursam,J Kaewkhao, and M Djamal
Research Centre for Electronics, National Research and Innovation Agency Republic of Indonesia (BRIN), 40135, Bandung, Indonesia
Abstract
For several decades, energy conversion from solar irradiance to electricity has been successfully conducted by solar cells device. However, not all solar wavelengths can be captured by solar cells. It is found the absorption limitation of band gap energy for all solar cell types in the ultraviolet region (high photon energy) and infrared region (low photon energy) leading to 70% energy loss. Introducing the material which can convert higher photon energy to the lower photon energy that is suitable with solar cell bandgap energy is one of the solutions for this problem. In the present work, we have prepared glass using the melt and quenching technique with the composition of 30BaO + 10 ZnF2 + 30 B2O3 + (30-x)TeO2 + xLn2O3 where xLn2O3 is 1 mol% of D2O3, 1 mol% of Sm2O3, and 1.5 mol% of Eu2O3. The absorption spectra of glass samples show several absorption bands in the ultraviolet to infrared region. Meanwhile, the emission spectra of glass samples confirm the agreement with DSSC absorption spectra in the visible region. Furthermore, we demonstrate the I-V measurement by placing glass samples on the top of the DSSC device for understanding the glass samples role. The DSSC parameters including efficiency, fill factor (FF), short-circuit current (ISC), and open-circuit voltage (VOC) are presented in detail. The I-V measurement validates the increasing DSSC efficiency indicating the enlargement of photon generation in the device. In summary, we can conclude that the present glass possesses high potential for a solar cell application, wherein Eu3+ ion doped glass is the most probable candidate for UV down-conversion material as one of light management technology of DSSC device.
