mohammadnozari+summary

This paragraph talks about making a solar cell based on String Ribbon wafer with adjusted situation for making it. 1st Paragraph talks about how in general String Ribbon wafers are produced and the reason is low cost. 2nd Paragraph talks about previously made String Ribbon wafers and their efficiency and the reason for making this one is to increase the efficiency more than previous ones. 3rd Paragraph talks about Rapid Thermal Processing method which is used. Background: This part talks about the processes which were used in past and present by Georgia Tech for Producing 16.2% cell. 1st paragraph mentions the experimental process involved: Standard String Ribbon were purchased from Evergreen production, cut in optimum sizes and Si film were deposited. 2nd paragraph talks about Firing temperature and range, an after that Ag is plated on the films and then Adjust the situations for optimum result. 1st paragraph explains the figure1 which is a diagram of efficiency obtained. 2nd paragraph talks about figure2 which is a diagram of efficiency as a function of firing temperature. And optimum efficiency 17.8 % was obtained at 740 C firing at 60 seconds. 3rd paragraph explain about figutre3 and in details talks about firing temperature and time and based on that suggests that hydrogenation of bulk defects take place at a short time which the follows by giving diffusivity formula for hydrogen. 4th paragraph gives reason why cells are produced in 2 ohm centimeter FZ and then explains the dependence of open circuit voltage on firing temperature. 5th paragraph based on IQE response come to the conclusion that firing temperature over 740 C does not affect quality noticeably. 6th paragraph talks about Al-BSF quality determination equation and the terms used for this equation. 7th paragraph talks about figures 7, and 8 which are cross section SEM images which were used for measuring uniformity and then continues by typical firing conditions ( temperature range of 800-850 C and more that 30 seconds and then talks about the difference between theoretical an calculate data from which it concludes that thermodynamic equilibrium was not reached. 1st paragraph talks about success in combing industrial process of silica coating and screen printed Al-BSF with laboratory process. 2nd paragraph talks about situation which caused improved string ribbon solar cell with efficiency of 17.8 %
 * Summary:**
 * Abstract:**
 * Introduction:**
 * Experimental:**
 * Results and Discussion :**
 * Conclusion:**

This summary was form the following article: D.S. Kim, *A.M. Gabor, V. Yelundur, A.D.Upadhyaya, V. Meemongkolkiat, A. Rohatgi University Center for Excellence in Phot ovoltaic Research and Education; School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332 USA
 * STRING RIBBON SILICON SOLAR**
 * CELLS WITH 17.8% EFFICIENCY**
 * Evergreen Solar Inc., 259 Cedar Hill St., Marlboro, MA 01752 USA

http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=9136