It was intended to reveal the time dependent power generation under different loads for two different solar panels under the conditions of Bursa province in between August 19 and 25, 2014. The testing sets include solar panels, inverter, multimeter, accumulator, regulator, pyranometer, pyrheliometer, temperature sensor, and datalogger. The efficiency of monocrystalline and polycrystalline solar panels was calculated depending on the climatic data’s measurements. As the result of the study, the average performances of monocrystalline and polycrystalline panels are 42.06 and 39.80 Wh, respectively. It was seen that 87.14 W instantaneous power could be obtained from monocrystalline solar panel and that 80.17 W instantaneous power could be obtained from polycrystalline solar panel under maximum total radiation (1001.13 W/m2). Within this frame, it was determined that monocrystalline solar panel is able to operate more efficiently under the conditions of Bursa compared to polycrystalline solar panel. When the multivariate correlations coefficients were examined statistically, a significant relationship in positive direction was detected between total and direct radiation and ambient temperature on energy generation from monocrystalline and polycrystalline panel.

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TiO2 is used in many sectors of industry such as health, food, defense, and energy. It is a well-known fact that TiO2 is especially used in applications in the field of organic hybrid solar cells (OHSC) as an electron transfer layer in the energy sector. However, the OHSCs have a degradation problem because of atmospheric stress factors such as laboratory atmosphere, prolonged light application (light soaking), and UV light. To understand the meta/instability problem in OHSC, it is required to be examined independently for each layer consisting of the solar cell. In this study, the TiO2 layer, widely used in OHSC applications, was grown on a rough glass substrate using a spin coating method. TiO2 layer was structurally and electrically characterized by XRD and photoconductivity methods respectively. TiO2 layer was characterized by exposure step by step to stress factors that are stated to cause electronic meta/instability in organic hybrid solar cells. Mobility-lifetime products were calculated from the flux-dependent photoconductivity and correlated with the electronic defects in the material due to stress factors. The findings in experiments show the laboratory atmosphere creates surface-related defects that can be eliminated by annealing. Light soaking, UV aging, and oxygen aging also create electronic defects associated with bandgap energy positions. These defects are partially eliminated with an annealing application.

Methylammonium lead iodide (MAPbI3) (CH3NH3PbI3) has great potential for several fields, especially for photovoltaic applications. Unfortunately, MAPbI3 can seriously suffer from degradation. Hence, the degradation problem limits the photovoltaic and other potential applications of this material. In order to produce a stable photovoltaic material, the degradation mechanism and electronic defect profile of MAPbI3 should be understood carefully, especially regarding its conductivity. In this study, electronic defect changes due to stress factors were evaluated. MAPbI3 films were deposited using thermal chemical vapor deposition (Thermal CVD) and spin coating techniques. Morphological differences due to deposition temperatures were defined by using scanning electron microscopy (SEM). Elemental analysis and structural analysis were conducted by energy-dispersive X-ray spectroscopy (EDS) and X- ray diffraction (XRD), respectively. Deposited MAPbI3 films were exposed to in-situ stress factors such as vacuum atmosphere, deionized water vapor (DIWV) atmosphere, and UV light soaking at constant temperature (300 K) in order to define degradation and electronic defect changes. The electronic changes in the samples were investigated by time-dependent dark conductivity, temperature-dependent dark conductivity, and flux-dependent photoconductivity. This study provides an in-depth understanding of the degradation mechanism and electronic defect profile of MAPbI3 regarding its conductivity.

The fact that the current energy production resources have a tendency to be extinguished rapidly, the raw material prices have increased, their negative effects on the environment and human health, some difficulties in their use have increased the studies conducted on new and renewable energy sources in recent years. Among the renewable energy technologies, even though it is somewhat expensive, the easiest technology in terms of design and installation is the photovoltaic technology which is an application of solar energy. But its real superiority arises from the fact that it is a technology that does not pollute the environment, is environmentally friendly and has low maintenance costs. The use of solar energy has increased considerably with the increase in the use of renewable energy sources in the world and in our country in recent years and the roofs have had the largest share in this regard. Considering that more than 50% of the installed facilities in Germany and Italy, which are the starting point of solar energy in Europe, are on the roofs, the roofs have an important place in the increase of solar energy usage. Turkey is in fortunate situation compared to many countries in terms of the solar energy potential due to its geographical location. South Eastern Anatolia Region is the region that receives the most solar energy, this is followed by the Mediterranean Region. The logistics sector has recently been one of the sectors in which the solar energy is widely used in the world and in Turkey. In particular, significant reductions have been achieved in logistics costs with the solar energy systems installed on the roofs of the logistics warehouses, this event have increased the competitiveness of the companies. In addition, it is known that solar energy has been started to be used in the transportation activities and there are R & D studies for increasing road vehicles and cargo ships working with solar energy. In addition, efforts are being made to improve the solar-powered highways which strengthen the transport infrastructure and the logistics processes and these applications are becoming widespread. In study, the solar energy which is one of the mostly interested one among the renewable energy forms and the photovoltaic technology producing electrical energy using it will be discussed in this context, an then the current situation in Turkey and the World will be presented. Finally, the usage of the solar energy in the logistics sector and the applicaton examples in the world and in Turkey will be included.