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Senthilnathan V.,Kumaraguru College of Technology | Ganesan S.,Government College of Technology, Coimbatore | Senthilnathan S.,Nathascom Research Ideas Center | Gandhi V.V.,Larsen and Toubro Ltd
Journal of Optoelectronics and Advanced Materials | Year: 2010

In the current scenario of energy requirements solar cell is one of the important pollution free energy converter. In photovoltaic field Dye-Sensitized Solar Cell (DSSC) is one of the most promising method for a high-performance solar cell in the next generation, since it is fabricated by a simple manufacture process at relatively low cost. The focus of interest in this research paper is to mention the fabrication & working of this novel single & simple apparatus of microcontroller aided SPTD (Spray Pyrolysis Thin film Deposition) for fabricating the electrode and counter electrode for DSSC. It involves the novelties introduced in the instrumentation of the apparatus and the characterisations (XRD, SEM & AFM) of the prepared thin films for the fabricated DSSC. (In this novel apparatus design, TiO2 thin film formation is happening by spin cum spray pyrolysis).The grape fruit skin dye is used to sensitize the Nano TiO2 thin films. The thin films prepared by this novel method are tested for its DSSC performance. The results are in agreement/matching with conventional methods. The efficiency of assembled DSSC is 0.24%. Source


Senthilnathan V.,Kumaraguru College of Technology | Ganesan S.,Government College of Technology, Coimbatore | Senthilnathan S.,Nathascom Research Ideas Center | Vijayakumar Gandhi V.,Larsen and Toubro Ltd
Optoelectronics and Advanced Materials, Rapid Communications | Year: 2010

In thin film technology the Spray Pyrolysis Thin film Deposition (SPTD) method of thin film preparation being considered in research to prepare thin and thick films, ceramic coatings, and powders [1] for many decades. It's a versatile and effective technique to deposit metal oxide films and even multilayered films. Thin films are used in different applications like Solar cells, optoelectronics, sensors etc. It is a very simple and relatively cost-effective processing method (especially with regard to equipment costs). In this paper the importance of intermittent spray and its economic automation using microcontroller are discussed in detail. This in turn helps to prepare good thin film materials for various applications. Source


Senthilnathan V.,Kumaraguru College of Technology | Ganesan S.,Government College of Technology, Coimbatore | Senthilnathan S.,Nathascom Research Ideas Center | Vasu M.V.,Nathascom Research Ideas Center | Gandhi V.V.,Larsen and Toubro Ltd
Journal of Optoelectronics and Advanced Materials | Year: 2010

Spray pyrolysis represents a very simple and relatively cost-effective processing method (especially with regard to equipment costs). The quality and properties of the films depend largely on the process parameters. The most important parameter is the substrate surface temperature. In Intermittent spray the spray is paused after regular interval to reduce the drop down of substrate temperature in continuous spray. It is a proven fact that intermittent spray has advantages over the continuous spray pyrolysis deposition. In this work the SPTD equipment is fabricated. The novelty is the use of a simplified low cost microcontroller to automate the intermittent spray process as per the requirements. In this it simultaneously governs the precise intermittent spray, ventilation of the chamber and substrate movement. Hence, it becomes almost an automatic coating process which helps to get quality thin films. The focus of interest in this research paper is to mention the computer programme written in C language for the microcontroller. It automatically controls the spray process as per the user defined intermittent spray settings. Using this economic device thin film like TCO and TiO2 were prepared for studying / manufacturing Dye Sensitised Solar Cell (DSSC). This paper is expected to be useful for researchers and manufacturers for making thin films by almost automatic SPTD method. Source

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