No abstract

Organic dyes are very important in improving the performance of solar cells, at very low prices and friendly to the environment. DN-F15 transparent green is a squaraine dye with good stability on DSSC or with an alternative name HSQ4. HSQ4 is a synthetic dye that is very expensive, but sensitive to light so that it can improve the performance of solar cells. DSSC uses titanium dioxide (TiO2) as a semiconductor, electrodes are used as substrates for the flow of electric charge. DN-EP01 is a thixotropic terpineol-based screen-printable Pt paste with a viscosity of 4-7 Pa.s at 10s−1. In furnaces around 450°C will produce an even and transparent platinum particle layer which has high catalytic activity. The color of the platinum paste is straw or light yellow. Measurement of absorbance dyes solution using a spectrophotometer with a wavelength of 400 nm -800 nm. Characterization of I-VDSSC Carica Papaya produced a V ocvalue of 560 mV, Isc 1.5 x 10−4 A, fill factor 0.47 and efficiency of 0.43%. After doping with HSQ4 the concentration of 1 resulted in a Voc value of 378 mV, Isc 4.0 x 10−4 A, fill factor 0.49 and efficiency of 0.14%. An increase in efficiency in variation 3 is 0.24% and variation 5 is 0.35%, this shows the effect of HSQ4 concentration on the coloring of papaya leaf extract can improve the performance of DSSC.

Penelitian ini bertujuan untuk menguji hubungan media pembelajaran daring dan minat belajar siswa. Penelitian ini merupakan penelitian survei dengan pendekatan kuantitatif. Subjek penelitian ini terdiri dari 30 siswa SMA Negeri Lurasik. Instrumen penelitian berupa angket pernyataan sebanyak 30 butir tentang pernyataan. Data penguasaan pelajaran fisika dengan media pembelajaran daring dan minat belajar, diuji dengan uji t dan produck moment. Hasil penelitian menunjukkan bahwa terdapat pengaruh media pembelajaran daring terhadap minat belajar siswa kelas XI IPA SMA Lurasik diperoleh nilai koefisien thitung = 4,257059 kemudian dicari ttabel dengan ? = 5% dengan df = n-2 = 30- 2 = 28 diperoleh tabel (0,05 : 26) = 2,048. Berdasarkan fakta tersebut, dapat disimpulkan bahwa terdapat hubungan yang signifikan dan nyata antara media pembelajaran daring dengan minat belajar.

<p>The natural dye extracted from Amaranthus dye and Carica Papaya dye which has been prepared in ethanol solution as a sensitizer on DSSC. The Spin coating method is used so that the deposition on TiO₂ gets a homogeneous thin layer on the active area of the FTO substrate. The dye solution was tested for characterization using the Elkahfi I-V Meter and UV-Vis 1601 while the FTO structure substrate that had been prepared as a sandwich was tested using Keithley I-V type 2602A. The result of absorbance of dye is at a wavelength of 400 nm - 800 nm and there is also a shift in wavelength and peak absorption of the dye. The greatest efficiency was obtained from chlorophyll amaranthus which is 0.730% while chlorophyll Carica papaya obtained an efficiency of 0.432%. In the combination of Amaranthus dye and Carica papaya dye, the efficiency was 0.526%. High efficiency on TiO₂ electrodes shows good performance on Dye-sensitized solar cells.</p>