Fig. 2. Aspect ratio as a function of structural angle for the various types of textured PV mini-module cover glass (Etch-1, Etch-2, and Etch-3)
Fig. 3. FDTD simulation and measurement results for Etch-1, Etch-2, and Etch-3. (a) Spectral transmittance and (b) average transmittance for the wavelength range of 400 to 1100 nm, and (c) FDTD simulation images of the light wave propagation occurring immediately after light reaches the textured surface
Fig. 4. Comparison of current density as a function of applied voltage (I-V curves) for PV modules with a non-textured cover glass and Etch-1-, Etch-2-, and Etch-3-type cover glasses
Fig. 5. EQE curves for PV modules with a non-textured cover glass and an Etch-2-type textured cover glass
Fig. 1. (a) Ultraviolet photolithography process for cover glass texturing, (b) types of textured glasses, (c) layers of HIT Si solar cell, and (d) module structure including the textured cover glass and HIT Si solar cells
Table 1. Glass texturing structures according to chemical etching conditions, and structural parameters (aspect ratio) and haze values (HT)
Table 2. Comparison of I-V and structural results of PV modules with different texturing glass
참고문헌
- K. Yoshikawa, H. Kawasaki, W. Yoshida, T. Irie, K. Konishi, K. Nakano, T. Uto, D. Adachi, M. Kanematsu, H. Uzu, J. Yamamoto, "Silicon heterojunction solar cell with interdigitated back contacts for a photoconversion efficiency over 26%", Nat. Energy, Vol. 2, 17032, 2017. https://doi.org/10.1038/nenergy.2017.32
- C. Battaglia, A. Cuevas, S. De Wolf, "High-efficiency crystalline silicon solar cells: status and perspectives", Energy Environ. Sci., Vol. 9, pp. 1552-1576, 2016. https://doi.org/10.1039/C5EE03380B
- F. Mavromatakis, F. Vignola, B. Marion, "Low irradiance losses of photovoltaic modules", Sol. Energy, Vol. 157, pp. 496-506, 2017. https://doi.org/10.1016/j.solener.2017.08.062
- P. G. Piedra, L. R. Llanza, H. Moosmuller, "Optical losses of photovoltaic modules due to mineral dust deposition: Experimental measurements and theoretical modeling", Sol. Energy, Vol. 164, pp. 160-173, 2018. https://doi.org/10.1016/j.solener.2018.02.030
- B. Geetha Priyadarshini, A. K. Sharma, "Design of multi-layer anti-reflection coating for terrestrial solar panel glass", Bull. Mater. Sci., Vol. 39, No. 3, pp. 683-689, 2016. https://doi.org/10.1007/s12034-016-1195-x
- D. Huh, J.-H. Shin, M. Byun, S. Son, P.-H. Jung, H.-J. Choi, Y.-D. Kim, H. Lee, "Analysis of long-term monitoring data of PV module with SiOx-based anti-reflective patterned protective glass", Sol. Energy Mater. Sol. Cells, Vol. 170, pp. 33-38, 2017. https://doi.org/10.1016/j.solmat.2017.05.031
- R. Bohme, K. Zimmer, "Low roughness laser etching of fused silica using an adsorbed layer", Appl. Surf. Sci., Vol. 239, pp. 109-116, 2004. https://doi.org/10.1016/j.apsusc.2004.05.095
- F. Chen, H. Liu, Q. Yang, X. Wang, C. Hou, H. Bian, W. Liang, J. Si, X. Hou, "Maskless fabrication of concave microlens arrays on silica glasses by a femtosecond-laser-enhanced local wet etching method", Opt. Express, Vol. 18, No. 19, pp. 20334-20343, 2010. https://doi.org/10.1364/OE.18.020334
- C. Xie, X. Li, K. Liu, M. Zhu, R. Qiu, Q. Zhou, "Direct writing of sub-wavelength ripples on silicon using femtosecond laser at high repetition rate", Appl. Surf. Sci., Vol. 360, pp. 896-903, 2016. https://doi.org/10.1016/j.apsusc.2015.11.082
- C. Battaglia, C. M. Hsu, K. Soderstrom, J. Escarre, C. Ballif, "Light trapping in solar cells: can periodic beat random?", ACS Nano, Vol. 6, No. 3., pp. 2790-2797, 2012. https://doi.org/10.1021/nn300287j
- P. Spinelli, V. E. Ferry, J. V. D. Groep, M. V. Lare, A. Polman, "A Plasmonic Light Trapping in Thin-Film Si Solar Cells", J. Opt., Vol. 14, No. 2, pp. 024002-024013, 2012. https://doi.org/10.1088/2040-8978/14/2/024002
- G. Kumaravelu, M. M. Alkaisi, A. Bittar, D. Macdonald, J. Zhao, "Damage studies in dry etched textured silicon surfaces", Current. Appl. Phys., Vol. 4, No. 2-4, pp. 108-110, 2004. https://doi.org/10.1016/j.cap.2003.10.008
- M. Tucci, E. Salurso, F. Roca, F. Palma, "Dry cleaning process of crystalline silicon surface in a-Si:H/c-Si heterojunction for photovoltaic applications", Thin Solid Films, Vol. 403-404, pp. 307-311, 2002. https://doi.org/10.1016/S0040-6090(01)01645-5
-
J. Yoo, K. Kim, M. Thamilselvan, N. Lakshminarayn, Y. K. Kim, J. H. Lee, K. J. Yoo, J. Yi, "RIE texturing optimization for thin c-Si solar cells in
$SF_6/O_2$ plasma", J. Phys. D: Appl. Phys., Vol. 41, No. 12, 125205, 2008. https://doi.org/10.1088/0022-3727/41/12/125205 - A. Hongsingthong, T. Krajangsang, I. A. Yunaz, S. Miyajima, M. Konagai, "ZnO Films with Very High Haze Value for Use as Front Transparent Conductive Oxide Films in Thin-Film Silicon Solar Cells", Appl. Phys. Express, Vol. 3, pp. 051102-051111, 2010. https://doi.org/10.1143/APEX.3.051102
-
A. Hongsingthong, I. A. Yunaz, S. Miyajima, M. Konagai, "Preparation of ZnO thin films using MOCVD technique with
$D_2O/H_2O$ gas mixture for use as TCO in silicon-based thin film solar cells", Sol. Energy Mater. Sol. Cells, Vol. 95, No. 1, pp. 171-174, 2011. https://doi.org/10.1016/j.solmat.2010.04.025 - H. Zhang, B. Ding, T. Chen, "A high efficiency industrial polysilicon solar cell with a honeycomb-like surface fabricated by wet etching using a photoresist mask", Appl. Surf. Sci., Vol. 387, pp. 1265-1273, 2016. https://doi.org/10.1016/j.apsusc.2016.07.039
- S. B. Kim, S. M. Iftiquar, D. H. Lee, H. J. Lee, J. H. Kim, J. H. Jung, D. H. Oh, V. A. Dao, J. Yi, "Improvement in Front-Contact Resistance and Interface Passivation of Heterojunction Amorphous/Crystalline Silicon Solar Cell by Hydrogen-Diluted Stack Emitter", IEEE J. Photovolt., Vol. 6, No. 4, pp. 837-845, 2016. https://doi.org/10.1109/JPHOTOV.2016.2553779
- J. -Y. Li, C. -H. Hung, C. -Y. Chen, "Hybrid black silicon solar cells textured with the interplay of copper-induced galvanic displacement", Sci. Rep., Vol. 7, pp. 17177, 2017. https://doi.org/10.1038/s41598-017-17516-6
- L. Chen, Q. Wang, W. Chen, H. Huang, X. Shen, "Investigation of a novel frosted glass with regular pit array texture", J. Mat. Proc. Techno., Vol. 238, pp. 195-201, 2016. https://doi.org/10.1016/j.jmatprotec.2016.06.001
- T. Maier, D. Bach, P. Mullner, R. Hainberger, H. Bruckl, "Antireflective surface structures in glass by self-assembly of SiO2 nano particles and wet etching", Opt. Express, Vol. 21, No. 17, 20254, 2013. https://doi.org/10.1364/OE.21.020254
- H. S. Park, M. H. Shin, H. S. Kim, S. B. Kim, A. H. Tuan Le, J. Y. Kang, Y. J. Kim, D. P. Pham, J. H. Jung, J. Yi, "Investigation of 3-dimensional structural morphology for enhancing light trapping with control of surface haze", Opt. Mater., Vol. 66, pp. 404-409, 2017. https://doi.org/10.1016/j.optmat.2017.02.039
- S. Q. Hussain A. H. Tuan Le, K. Mallem, H. S. Park, M. K. Ju, Y. J. Kim, J. H. Cho, J. J. Park, Y. K. Kim, J. Yi, "Using the light scattering properties of multi-textured AZO films on inverted hemisphere textured glass surface morphologies to improve the efficiency of silicon thin film solar cells", Appl. Surf. Sci., Vol, 447, pp. 866-875, 2018. https://doi.org/10.1016/j.apsusc.2018.03.143
- H. S. Park, S.-H. Nam, M. H. Shin, M. K. Ju, Y.-J. Lee, J.-H. Yu, J. H. Jung, S. B. Kim, S. H. Ahn, J.-H. Boo, J. Yi, "Method for Fabricating Textured High-Haze ZnO:Al Transparent Conduction Oxide Films on Chemically Etched Glass Substrates", J. Nanosci. Nanotechnol. Vol. 16, No. 5, pp. 4886-4892, 2016. https://doi.org/10.1166/jnn.2016.12223
- H. S. Park, M. H. Shin, H. S. Kim, S. B. Kim, A. H. Tuan Le, Y. K. Kim, S. H. Ahn, J.-J. Jeong, J. Yi, "Wideband Light Scattering of Periodic Micro Textured Glass Substrates for Silicon Thin-Film Solar Cells", J. Nanosci. Nanotechnol., Vol. 17, No. 11, pp. 8562-8566, 2017. https://doi.org/10.1166/jnn.2017.15154
- H. S. Park, Y. -J. Lee, S. H. Ahn, S. B. Kim, J. Yi, "Effect of wet textured glass surface morphology on the haze ratio and aspect ratio for amorphous silicon thin film solar cells", J. Renew. Sustain, Energy, Vol. 6, No. 5, 053141, 2014. https://doi.org/10.1063/1.4899198
- S. M. Ji, K. J. Song, T. B. Nguyen, N. S. Kim, H. Lim, "Optimal Moth Eye Nanostructure Array on Transparent Glass Towards Broadband Antireflection", ACS Appl. Mater. Interfaces, Vol. 5, No. 21, pp. 10731-10737, 2013. https://doi.org/10.1021/am402881x