Fahru Nurosyid

Kajian pH Klorofil Terhadap Ikatan Kimia Dye pada TiO2 sebagai Aplikasi Dye-Sensitized Solar Cell (DSSC)

This study was conducted to examine the effect of pH on chemical bonding of chlorophyll dye on TiO 2 for application of DSSC. Variations of pH used in this study without the addition of buffers, acids, neutrals, and bases. The absorbance of chlorophyll dye and TiO 2 were characterized using UV-Vis spectrophotometer. The chemical bonds contained in TiO 2 -chlorophyll dye were characterized FTIR spectrophotometer. The efficiency of DSSC was calculated using I-V meter. The characterization results showed that pH of acids has the highest absorbance in the wavelength range 400-480 nm and 600-680 nm. The highest conversion efficiency of 0.013% with the transmittance of 89.3% at the wave number 3417 cm -1 .

Pengaruh Waktu terhadap Efisiensi Dye-Sensitized Solar Cell (DSSC)

Penelitian ini mengkaji pengaruh waktu terhadap effisiensi Dye Sensitized Solar Cell (DSSC). Jarak elektroda divariasi sebesar 76 µm dan 114 µm. Karakterisasi sifat listrik menggunakan Keithley I-V meter yang dilakukan selama 21 hari dengan selang 7 hari untuk mengetahui kestabilannya. Karakterisasi I-V dengan selang waktu pengukuran menunjukkan bahwa DSSC dengan jarak elektroda 76 µm stabil hingga hari ke-7 dengan efisiensi 0,0347%. Pada jarak 114 µm stabil hingga hari ke-14 dengan efisiensi 0,0117%.

Comparison of Titanium Dioxide (TiO2) nanoparticle-nanofiber and nanofiber-nanoparticle on the application of dye-sensitized solar cell (DSSC)

Dye-sensitized Solar Cell (DSSC) is a solar cell that has great potential in the future because of the cheaper cost of fabrication and environmentally friendly basic ingredients. This study aims to determine the effect of type of screen on the TiO2 layer as the active electrode DSSC. The active electrode TiO2 based DSSC fabricated by the method of double layer. Efficiency Dye-sensitized Solar Cell (DSSC) can be obtained from the current-voltage curve I-V meter. Nanofiber on the nanoparticles can reach a highest efficiency of DSSC about 0,015%. The second variation of between nanofiber-nanoparticle layering, and nanoparticle-nanofiber, it appears that the nanofiber layer of nanoparticles above, no significant changes, namely in 10 minutes η = 0.014965; 15 minutes η = 0.011021 and 20 minutes η = 0.013332. This is demonstrated by the nature of the dominant nanofiber as a photon trap covered by the nature of the dominant nanoparticles absorb the dye, so that overtime does not affect the incoming electron. While the results of nanofiber layer on the nanoparticles changed significantly in the variation of 20 minutes, ie η = 0.00283. You can also see the most optimum time was 15 minutes, which is η = 0.01559. This may be due in this 15 minute nanofiber coating has a thickness that is optimum so that electrons can reach the electrode diffuse due to the interaction between photons and the dye more.

Effect of sintering temperatures and screen printing types on TiO2 layers in DSSC applications

Dye-Sensitized Solar Cell (DSSC) is a candidate solar cell, which has a big potential in the future due to its eco-friendly material. This research is conducted to study the effect of sintering temperature and the type of screen-printing toward the characteristics of TiO2 layer as a working electrode in DSSC. TiO2 layers were fabricated using a screen-printing method with a mesh size of T-49, T-55, and T-61. TiO2 layers were sintered at temperatures of 600°C and 650°C for 60 min. DSSC structure was composed of TiO2 as semiconductors, ruthenium complex as dyes, and carbon as counter electrodes. The morphology of TiO2 layer was observed by using Nikon E2 Digital Camera Microscopy. The efficiencies of DSSC were calculated from the I-V curves. The highest efficiency is 0.015% at TiO2 layer fabricated with screen type T-61 and at a sintering temperature of 650°C.Dye-Sensitized Solar Cell (DSSC) is a candidate solar cell, which has a big potential in the future due to its eco-friendly material. This research is conducted to study the effect of sintering temperature and the type of screen-printing toward the characteristics of TiO2 layer as a working electrode in DSSC. TiO2 layers were fabricated using a screen-printing method with a mesh size of T-49, T-55, and T-61. TiO2 layers were sintered at temperatures of 600°C and 650°C for 60 min. DSSC structure was composed of TiO2 as semiconductors, ruthenium complex as dyes, and carbon as counter electrodes. The morphology of TiO2 layer was observed by using Nikon E2 Digital Camera Microscopy. The efficiencies of DSSC were calculated from the I-V curves. The highest efficiency is 0.015% at TiO2 layer fabricated with screen type T-61 and at a sintering temperature of 650°C.

Influences mass concentration of P3HT and PCBM to application of organic solar cells

Poly (3-hexylthiophene) (P3HT) and [6, 6] -phenyl-C61-butyric acid methyl ester (PCBM) are used for the organic solar cell applications. P3HT and PCBM act as donors and acceptors, respectively. In this study the efficiency of the P3HT: PCBM organic solar cells as function of the mass concentration of the blend P3HT: PCBM with 1, 2, 8, 16 mg/ml. Deposition P3HT:PCBM film using spin coating with a rotary speed of 2500 rpm for 10 seconds. Optical properties of absorption spectra characteristic using a UV-Visible Spectrometer Lambda 25 and electrical properties of I-V characteristic using Keithley 2602 instrument. The results of absoption spectra for P3HT:PCBM within different mass concentration obtained 500-600 nm wavelengths. The Energy-gap obtained about 1.9eV. The organic solar cells device performance were investigated using I-V cahractyeristic. For mass concentration of 1, 2, 8 and 16 mg/ml P3HT:PCBM were obtained 0.5×10-3%, 2.2×10-3%, 5.9×10-3%, and 6.1×10-3% efficiency of organics solar cells respectively.

Fabrication of organic solar cells with design blend P3HT: PCBM variation of mass ratio

Organic solar cells of FTO/PEDOT: PSS/P3HT: PCBM/Al has been fabricated, and its performance has been tested in dark and under various illumination of light intensity 1000 W/m2. The active materials used in this study are poly (3- hexylthiophene) (P3HT) and [6, 6]-phenyl-C61-butyric acid methyl ester (PCBM). P3HT is the donor while PCBM acts as an acceptor. Variation of PCBM and P3HT are 1:1, 1:2, 1:3, 1:4 and 1:5. P3HT: PCBM was mixed by chlorobenzene solvents. The mixing was done by using the ultrasonic cleaner. The absorbance characterization using by UV-Visible Spectrometer Lambda 25 instrument and I-V characterization has been tested using a set of 2602A Keithley instrument. Absorbance characterization shows that two peaks are formed. The first peak in the range of 300 to 350 nm which is a range of PCBM and the second peak range from 450 to 600 nm which is a range of P3HT. As the mass ratio increases, the second peak of P3HT increases while the first peak does not change. The gap energy estimated by the Tauc method is 2.0 eV. I-V characterization of the efficiency was obtained. The efficiency of sample 1, 2, 3, 4, and 5 are 5.80x10-2%; 6.46x10-2%; 7.72x10-2%; 8.25x10-2% and 9.81x10-2%, respectively. The highest value of efficiency was obtained at mass ratio 1:5.