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In this work, we are interesting in the measurement of thermal conductivity (on the surface and in-depth) of Porous silicon by the micro-Raman spectroscopy. This direct method (micro-Raman spectroscopy) enabled us to develop a systematic means of investigation of the morphology and the thermal conductivity of Porous silicon oxidized or no. The thermal conductivity is studied according to the parameters of anodization and fraction of silicon oxidized. Thermal transport in the porous silicon layers is limited by its porous nature and the blocking of transport in the silicon skeleton what supports its use in the thermal sensors

This study aims to produce DSSC solar cells using PEDOT as a substitute for iodine. This experiment was carried out in the physics laboratory of the Tadulako University FKIP. TiO2 was deposited on FTO glass measuring 2.5 x 2.8 cm using the doctor blade method. TiO2 film was produced after heating in a furnace at 450 ☐C. Subsequently, the film was soaked in Routinized dye for 30 minutes. PEDOT Carrageenan Lambda 1:1 is then dripped on a TiO2/dye layer and covered with a platinum counter electrode. The results of measurements of current and voltage under direct sunlight with an intensity of 746 W/m2 are 32.2 µA and 97.5 mV, respectively. These results indicate that the PEDOT Carrageenan solution has enough potential to be developed as a substitute for iodine electrolyte in the DSSC solar cell device.

This study aims to create a DSSC using PEDOT-Carrageenan-based electrolyte as a learning media for photovoltaic physics concepts. This research was experimental research conducted in the laboratory of subdepartment of physics education, Tadulako University. In this study, DSSC making process used a substrate made from TCO-FTO polymer. The TiO2 photoelectrode layer was deposited using the doctor blade technique and Ruthenizer as a dye-sensitizer and the platinum layer was deposited on the counter electrode using the sputtering technique. Process parameters that affect the characteristics of solar cells were analyzed and measured using the I-V characteristic curve. The samples measured consisted of several types of PEDOT-Carrageenan electrolytes, including Kappa, Lambda and Iota. The results of voltage measurements of each sample of the DSSC prototype were obtained quite well at a voltage of 91.8 mV using PEDOT-Carrageenan Kappa 1:2 electrolyte and the short circuit current obtained reached 57.6 uA. The best solar cell prototype produces an efficiency of 0.0003333728 %. It indicates that DSSC can be made by PEDOT-Carragenan electrolyte and can be used as a learning tool for photovoltaic physics concepts.

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