Publisher : The Korean Institute of Electrical and Electronic Material Engineers
DOI : 10.4313/TEEM.2015.16.6.303
Title & Authors
Effect of SiO2/ITO Film on Energy Conversion Efficiency of Dye-sensitized Solar Cells Woo, Jong-Su; Jang, Gun-Eik;
Multilayered films of ITO (In2O3:SnO2 = 9:1)/SiO2 were deposited on soda-lime glass by RF/DC magnetron sputtering at 500℃ to improve the energy conversion efficiency of dye-sensitized solar cells (DSSCs). The light absorption of the dye was improved by decrease in light reflectance from the surface of the DSSCs by using an ITO film. In order to estimate the optical characteristics and compare them with experimental results, a simulation program named EMP (essential macleod program) was used. EMP results revealed that the multilayered thin films showed high transmittance (approximate average transmittance of 79%) by adjusting the SiO2 layer thickness. XRD results revealed that the ITO and TiO2 films exhibited a crystalline phase with (400) and (101) preferred orientations at 2 θ = 26.24° and 35.18°, respectively. The photocurrent-voltage (I-V) characteristics of the DSSCs were measured under AM 1.5 and 100 mW/cm2 (1 sun) by using a solar simulator. The DSSC fabricated on the ITO film with a 0.1-nm-thick SiO2 film showed a Voc of 0.697 V, Jsc of 10.596 mA/cm2 , FF of 66.423, and calculated power conversion efficiency (ηAM1.5) of 5.259%, which was the maximum value observed in this study.