Optimization of the output voltage of on amorphous silicon pin solar cell

مقدم أطروحة جامعية

al-Hadithi, Adi Muhammad

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم الهندسة الكهربائية

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

1999

الملخص الإنجليزي

The main theme of this research is the design and optimization of PIN 1 r cells replying to the increasing worldwide demand for cheap inexhaustible energy source for extraterrestrial applications.

The primary problems associated with solar cell designs are addressed : i) low efficiency, ii) the generation associated losses, iii) low output power, and iv) open circuit voltage optimization.

The common approach for the design used currently is based on experience and judgment, which mi gilt produce inefficient or less optimized designs.

This thesis, however, introduces a means for utilizing the computer in the design and / or optimization of solar cell structures based on the amorphous silicon alloy material.

Being quite new, the field of research in the properties and characteristics of amorphous silicon is attractive for the design of a cheap highly efficient solar cell.

Yet the efficiencies reported up to date are all far below the theoretical limits of this material especially for the flat structure of the solar cell.

An alternative structure is investigated in this thesis based on a cylindrical solar cell with a concentrating reflector.

The detailed analysis and derivations of the device equations for the proposed structure are presented.

Moreover a sophistic a ted simulation program for the device operation under different extraterrestrial conditions is developed with the least amount of approximation and the results are shown and compared with the conventional flat structure data.

The simulation program is based on the numerical solution of the Poisson*s equation where the conventional approximations are avoided whenever possible.

The proposed structure has superior performance in terms of more power generated and higher short circuit current, open circuit voltage, efficiency, and fill factor over the present solar cell modules.

Moreover, the ability to combine the simulation program with optimization procedures is also investigated and applied successfully and a new procedure for the design and optimization of amorphous silicon solar cells is presented.

A set of analytical formulas for the photo-generated currents has been developed theoretically and verified in accordance with several equivalent circuit models for the solar tell.

A new technique to utilize these circuit models in the optimization procedure is also introduced based on relating the model parameters to actual physical parameters of the solar cell.

The result of this procedure is a highly efficient triple cell design where the stability and temperature performance of this design are also included in the simulation.

The aforementioned mathematical and numerical schemes have been implemented under the support of the MATLAB package version 5.1.

The results of the simulation indicate operational efficiencies as high as 13.6 % with an open circuit village of 0.9ftV and an extremely high short circuit current density of the order of 17.8 m A / cm1.

التخصصات الرئيسية

الهندسة الكهربائية

الموضوعات

• الخلايا الشمسية
• أشباه الموصلات غير المتبلورة

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-306215