Texturization and light trapping in silicon solar cells / U. Gangopadhyay, S. K. Dutta and H. Saha.

Format:

Book

Author/Creator:

Gangopadhya, U.

Contributor:

Dattā, Esa. Ke.

Saha, H.

Language:

English

Subjects (All):

Silicon solar cells.

Photovoltaic power generation.

Physical Description:

1 online resource (110 p.)

Edition:

1st ed.

Place of Publication:

New York : Nova Science Publishers, c2009.

Language Note:

English

Summary:

Reduction of optical losses in both mono and multicrystalline silicon solar cells by surface texturing is one of the important issues of modern silicon photovoltaics. Texturing of the front surface of silicon solar cells has been modeled and analysed with reference to the reduction in reflection co-efficient and increase in optical trapping. Significant enhancement in open circuit voltage and short circuit current has been achieved through such texturing of the front surface of mono-silicon solar cells. A proper optimisation of texture angle appears to be important for the best performance of the solar cells. An alternative way of reducing the surface reflection and enhancement of the cell parameters is to produce to passive front surface porous silicon layer.An analysis of the characteristics of a porous silicon layer shows that the morphology of the layer is an important design parameter. To realise the structures in practice, several methods are available, but many of this method are either not cost effective or commercially non available. In order to achieve good uniformity of pyramidal textured structure of the silicon surface, a mixture of NaOH/KOH and isopropyl alcohol (IPA) is generally used for texturization of mono crystalline solar cells.

Contents:

""TEXTURIZATION AND LIGHTTRAPPING IN SILICON SOLARCELLS""; ""TEXTURIZATION AND LIGHTTRAPPING IN SILICON SOLARCELLS""; ""CONTENTS""; ""PREFACE""; ""INTRODUCTION""; ""MODELS OF TEXTURIZATION""; ""2.1. SILICON SOLAR CELL WITH MICRO-GROOVED FRONTSURFACE AND LAMBERTIAN (RANDOMLY TEXTURED) BACKSURFACE""; ""2.1.1. Reflection Coefficient of Micro-Grooved Silicon FrontSurface""; ""2.1.2. Reflection Coefficient of the Micro-Grooved Silicon Surfacewith AR Coating for Different Slat Angles""; ""2.1.3. Cell Geometry, Light Trapping, Optical Path LengthEnhancement and Effective Absorption Co-Efficient""

""2.1.4.Effect of Texturization of Solar Cell Parameters""""2.2. DIFFERENT STRUCTURES FOR REDUCTION OFREFLECTION CO-EFFICIENT AND OPTICAL TRAPPING""; ""Lambertian Geometry""; ""2.2.1. Upright Pyramid Geometry""; ""2.2.2. Slat or Micro-Grooved Geometry""; ""2.2.3. Inverted Pyramids Geometry""; ""2.2.4. Simple Prism Pyramid Geometry""; ""2.2.5. Grating Geometry""; ""2.2.6. Three Perpendicular Planes (3PP) Geometry""; ""2.2.7. Perpendicular Slats Geometry""; ""2.2.8. Porous Silicon""; ""2.3. COMPARATIVE PERFORMANCE IN LIGHT TRAPPING FORSEVERAL GEOMETRIES""

""TECHNOLOGY FOR REALIZINGTEXTURIZATION FOR MONOCRYSTALLINESILICON SOLAR CELL""""3.1. STANDARD NAOH-IPA TEXTURIZATION APPROACH""; ""3.2. NEW TEXTURIZATION APPROACH""; ""3.2.1. Hydrazine Monohydrate �Isopropyl Texturization""; ""3.2.2. Tri-Basic Sodium Phosphate �Isopropyl Texturization""; ""3.2.3. Sodium Carbonate/Sodium Bicarbonate Texturization""; ""3.3. COMPARISON OF DIFFERENT ELECTRICALPARAMETERS OF MONOCRYSTALLINE SILICON SOLAR CELLUSING CONVENTIONAL NAOH TEXTURIZATION WITH THOSEUSING RECENTLY DEVELOPED TEXTURIZATION PROCESS""

""3.3.1. Conventional Sodium hydroxide-Isopropyl and Hydrazine �Isopropyl Textured Monocrystalline Silicon Solar Cell""""3.3.2. Conventional Sodium Hydroxide-Isopropyl and Tri SodiumPhosphate-Isopropyl Textured Monocrystalline Silicon Solar Cell""; ""3.4. INDUSTRIAL APPLICABILITY""; ""MULTICRYSTALLINE SILICON ETCHING FORSOLAR CELL FABRICATION""; ""4.1. ALKALINE ETCHANTS FOR MC-SI SOLAR CELLPROCESSING""; ""4.2. ISOTROPIC TEXTURING WITH HF-HNO3-H2O SOLUTIONFOR MC-SI SOLAR CELL PROCESSING""

""4.3. SODIUM HYDROXIDE - SODIUM HYPOCHLORITE (NAOH� NAOCL) SOLUTION FOR MC-SI SOLAR CELL PROCESSING""""4.4. MECHANICAL TEXTURING FOR MC-SI SOLAR CELLPROCESSING""; ""4.5. PLASMA ETCHING FOR MC-SI SOLAR CELLPROCESSING""; ""4.5.1. Reactive Ion Etching(Rie)""; ""4.5.2. Black Silicon Layer Formation by Rf Multi-Hollow CathodeSystem""; ""4.6. MULTICRYSTALLINE SILICON SOLAR CELLPERFORMANCE""; ""4.6.1. Multicrystalline Silicon Solar Cell Using Conventional NaOHTexturization""

""4.6.2. Comparison of Multicrystalline Silicon Solar CellPerformance Using Texturization with Naoh-Naocl and HighConcentration Naoh Solution""

Notes:

Description based upon print version of record.

ISBN:

1-60876-535-0

OCLC:

847643456