Distribution of Silicon iin the Allumiinum Matriix for Rear Passiivated Solla...Elías Urrejola
Solar cell concepts with passivated, locally contacted rear side have gained much interest over the last years due to the development of advanced passivation techniques. However, there are still open questions regarding the understanding of the local Al-Si contact formation and its influence on the local back-surface-field formation for industrial screen-printed aluminum pastes. In this work we show that the geometry of the rear pattern (contact size
and contact spacing) strongly influences the Al-Si interaction in the local contact openings: Si diffuses in Al through narrow dielectric barrier openings and spreads laterally to a determined limit determined by the firing temperature. We found that the contact spacing can affect the tendency for formation of Kirkendall voids below the Al-Si contacts instead of an eutectic layer. When decreasing the contact spacing and therefore the overlap of Al on each side of the local opening, the melt saturates faster and the formation of a high-quality local back-surface-field is increased, minimizing the presence of voids. This physical observation can enhance the design of the rear pattern for rear passivated solar cells and gives further understanding of the Al-Si interaction during the firing process.
Ofrecemos un resumen de los elementos más importantes respecto al comportamiento de la pandemia de Diabetes a nivel mundial, para ello nos basamos en la sexta edición del atlas de Diabetes que publicó la Federación Internacional de Diabetes (IDF)
This document provides information about the CIS107 Introduction to Computers course. It outlines that the instructor is Jan Gardner, the class will meet Tuesday/Thursday or Tuesday evenings from August to December, and required materials include a textbook, Office 2010 software, USB drive. It details the coursework including tutorials, assignments, quizzes on Word, PowerPoint, Excel and Access chapters. Grades are calculated based on skills assessments, tutorials, quizzes and assignments. The course goals are also summarized.
Escape from Excel - Retail Can't Survive and Thrive on SpreadsheetsJerry Inman
Surprisingly, more than 70% of retail companies use Excel as their principal tool for planning, demand forecasting and optimization. Many of these companies are in “Spreadsheet Hell”, a continuing state of inefficiency and disruption related to using Excel for cross channel merchandise and assortment management. Dozens, and even sometimes, hundreds of spreadsheets are used throughout an organization and its extended enterprise with incorrect or inconsistent formulas, inaccurate numbers, no central repository of information, and no version control. This leads to major inefficiencies, frustration, and decisions made based on incomplete information. And even with this enormous amount of data everywhere – information on sales, inventory and profits – it is generally not available in an aggregated view to intelligently take action.
The document discusses Andrew Goodwin's conventions of music videos and analyzes several music videos based on those conventions. Goodwin's conventions include demonstrating genre characteristics, relating lyrics and visuals, relating music and visuals, addressing record label demands, notions of looking, and intertextual references. The analyzed music videos generally comply with these conventions, with the exception of Gotye's "Somebody That I Used To Know" video, which is unique in not following conventions.
Usedbooks.com is an online marketplace for buying and selling used college textbooks in Bangkok, Thailand. It aims to help students save money on textbook costs. The business is run by a group of students and plans to initially partner with 30 universities in Bangkok, with the long term goal of expanding nationwide. It will offer a wide selection of used academic books and allow students to search listings, view book details, and make payments online. Financial projections estimate the business could become profitable within 3 years and generate positive returns, though risks include potential hacking, copycats, or disruptions to inventory.
Distribution of Silicon iin the Allumiinum Matriix for Rear Passiivated Solla...Elías Urrejola
Solar cell concepts with passivated, locally contacted rear side have gained much interest over the last years due to the development of advanced passivation techniques. However, there are still open questions regarding the understanding of the local Al-Si contact formation and its influence on the local back-surface-field formation for industrial screen-printed aluminum pastes. In this work we show that the geometry of the rear pattern (contact size
and contact spacing) strongly influences the Al-Si interaction in the local contact openings: Si diffuses in Al through narrow dielectric barrier openings and spreads laterally to a determined limit determined by the firing temperature. We found that the contact spacing can affect the tendency for formation of Kirkendall voids below the Al-Si contacts instead of an eutectic layer. When decreasing the contact spacing and therefore the overlap of Al on each side of the local opening, the melt saturates faster and the formation of a high-quality local back-surface-field is increased, minimizing the presence of voids. This physical observation can enhance the design of the rear pattern for rear passivated solar cells and gives further understanding of the Al-Si interaction during the firing process.
Ofrecemos un resumen de los elementos más importantes respecto al comportamiento de la pandemia de Diabetes a nivel mundial, para ello nos basamos en la sexta edición del atlas de Diabetes que publicó la Federación Internacional de Diabetes (IDF)
This document provides information about the CIS107 Introduction to Computers course. It outlines that the instructor is Jan Gardner, the class will meet Tuesday/Thursday or Tuesday evenings from August to December, and required materials include a textbook, Office 2010 software, USB drive. It details the coursework including tutorials, assignments, quizzes on Word, PowerPoint, Excel and Access chapters. Grades are calculated based on skills assessments, tutorials, quizzes and assignments. The course goals are also summarized.
Escape from Excel - Retail Can't Survive and Thrive on SpreadsheetsJerry Inman
Surprisingly, more than 70% of retail companies use Excel as their principal tool for planning, demand forecasting and optimization. Many of these companies are in “Spreadsheet Hell”, a continuing state of inefficiency and disruption related to using Excel for cross channel merchandise and assortment management. Dozens, and even sometimes, hundreds of spreadsheets are used throughout an organization and its extended enterprise with incorrect or inconsistent formulas, inaccurate numbers, no central repository of information, and no version control. This leads to major inefficiencies, frustration, and decisions made based on incomplete information. And even with this enormous amount of data everywhere – information on sales, inventory and profits – it is generally not available in an aggregated view to intelligently take action.
The document discusses Andrew Goodwin's conventions of music videos and analyzes several music videos based on those conventions. Goodwin's conventions include demonstrating genre characteristics, relating lyrics and visuals, relating music and visuals, addressing record label demands, notions of looking, and intertextual references. The analyzed music videos generally comply with these conventions, with the exception of Gotye's "Somebody That I Used To Know" video, which is unique in not following conventions.
Usedbooks.com is an online marketplace for buying and selling used college textbooks in Bangkok, Thailand. It aims to help students save money on textbook costs. The business is run by a group of students and plans to initially partner with 30 universities in Bangkok, with the long term goal of expanding nationwide. It will offer a wide selection of used academic books and allow students to search listings, view book details, and make payments online. Financial projections estimate the business could become profitable within 3 years and generate positive returns, though risks include potential hacking, copycats, or disruptions to inventory.