Crystal Growth of Si Ingots for Solar Cells Using Cast Furnaces

Crystal Growth of Si Ingots for Solar Cells Using Cast Furnaces

1st Edition - September 27, 2019

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  • Author: Kazuo Nakajima
  • Paperback ISBN: 9780128197486

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Crystal Growth of Si Ingots for Solar Cells Using Cast Furnaces is the first book written to both comprehensively describe these concepts and technologies and compare the strengths and weaknesses of various techniques. Readers will learn about the basic growth and characterization of Si crystals, including sections on the history of cast methods for Si ingots for solar cells. Methods discussed include the dendrite cast method, as well as other significant technologies, including the high-performance (HP) cast and mono-like cast methods. These concepts, growth mechanisms, growth technologies, and the problems that still need to be solved are all included in this comprehensive volume.

Key Features

  • Covers the concept of crystal growth, providing an understanding of each growth method
  • Discusses the quality of Si ingot, mainly from the viewpoint of crystal defects and their control
  • Reviews fundamental characterization concepts to discern the quality of ingots and wafers
  • Discusses concepts and technologies to establish a low-temperature region in a Si melt using the NOC method in order to obtain a uniform and large Si single ingot with low stress


Materials Scientists, industrial engineers, students, as well as young researchers involved in the R & D of solar cells

Table of Contents

  • 1. Basic growth and crystallographic quality of Si crystals for solar cells 1

    1.1 Si single and multi-crystals 1

    1.2 Basic growth of Si crystals 2

    1.3 Crystallographic structure and defects of Si crystals 14

    1.4 Impurities and their activities in defects 39

    1.5 Strain and stress 52

    1.6 Appendixes 53

    References 55

    2. Basic characterization and electrical properties of Si crystals 63

    2.1 Methods to measure electrical properties 63

    2.2 Electrical properties 65

    2.3 Optical measurement method and optical properties of Si crystals 77

    2.4 Processes to control electrical and optical properties of Si crystals 78

    2.5 Si crystal solar cells 88

    2.6 Theoretical estimation for the characterization of crystals 94

    References 95

    3. Growth of Si multicrystalline ingots using the conventional cast method 101

    3.1 Unidirectional growth of Si multicrystalline ingots 101

    3.2 Growth behavior of Si multicrystalline ingots 110

    3.3 Crystal defects and impurities in Si multicrystalline ingots 118

    3.4 Si3N4 coating materials 133

    3.5 Electrical properties and solar cells of Si multicrystalline ingots 143

    3.6 Growth of large-scale ingots in industry 145

    3.7 Key points for improvement 147

    References 148

    4. Dendritic cast method 155

    4.1 Motivation to develop the dendritic cast method 155

    4.2 Growth and behavior of dendrite crystals using the in-situ

    observation system 156

    4.3 Ingot growth controlled by dendrite crystals grown along the

    bottom of a crucible 165

    4.4 Arrangement of dendrite crystals 169

    4.5 Generation of dislocations 175

    4.6 Quality and solar-cell performance of Si ingots using the dendritic

    cast method 179

    4.7 Pilot furnace for manufacturing industrial scale ingots 184

    4.8 Key points for improvement and impact 187

    References 190

    5. High performance (HP) cast method 195

    5.1 Concept of the HP cast method 195

    5.2 Control of grain size, grain orientation and grain boundaries using

    assisted seeds 196

    5.3 Behavior and control of dislocations and dislocation clusters in ingots 204

    5.4 Structure and defects in Si ingots using the HP method 207

    5.5 Electrical properties and solar cells 216

    5.6 Key points for improvement 219

    References 221

    6. Mono-like cast method 225

    6.1 Concept and feature of the mono-like cast method 225

    6.2 How to control to obtain a large single grain 226

    6.3 Growth and control of small grains appeared from crucible wall 230

    6.4 Behavior of dislocations and precipitates in mono-like ingots 236

    6.5 Quality of Si ingots using the mono-like cast method 249

    6.6 Key points for improvement 254

    References 255

    7. Growth of Si ingots using cast furnaces by the NOC method 259

    7.1 Development of the NOC method 259

    7.2 Establishment of the low-temperature region in a Si melt 266

    7.3 Growth of Si ingots using Si3N4 coated crucibles by the NOC method 278

    7.4 Growth of Si single ingots using the NOC method 281

    7.5 Electrical properties and solar cells of Si single ingots 299

    7.6 Key points for improvement of the NOC method 308

    References 312

    8. Future technologies of Si ingots for solar cells 317

    8.1 Proper grain size and stress in Si multicrystalline ingots 317

    8.2 Novel technologies for dislocation-free single ingots with large

    diameter and volume 318

    8.3 Growth of square-shaped ingots using the NOC method 326

    8.4 Ga-doped Si multicrystalline ingots 334

    8.5 Si-Ge multicrystalline ingots 337

    References 345

    Index 349

Product details

  • No. of pages: 390
  • Language: English
  • Copyright: © Elsevier 2019
  • Published: September 27, 2019
  • Imprint: Elsevier
  • Paperback ISBN: 9780128197486

About the Author

Kazuo Nakajima

Professor Kazuo Nakajima is the professor emeritus of IMR Tohoku University, Japan as well as the Pao Yu-Kong Chair with Zhejiang University’s State Key Laboratory of Silicon Materials, China. He is a member of the Japan Society of Applied Physics and the Japanese Association for Crystal Growth and series on the Editorial Board of the Journal of Crystal Growth. In 2006, Dr. Nakajima founded and chaired the 1st International Workshop on Science and Technology of Crystalline Si Solar Cells, a workshop that continues to be held annually. In 2007-2008, he chaired the 4th Asian Conference on Crystal Growth and Crystal Technology (CGCT-4). For his achievements of the crystal growth, the Japanese Association for Crystal Growth awarded him “The 12th Achievement Award & Isamu Akasaki Award” at 2017, and the International Organization for Crystal Growth (IOCG) awarded him “Laudise Prize” at 2019. He has written over 16 books and handbooks and published over 350 papers, as well as being the inventor or co-inventor of 64 registered patents in the areas of III-V liquid phase epitaxial growth, crystal growth for semiconductors, optical devices, solar cells and plastic deformation.

Affiliations and Expertise

KAZUO NAKAJIMA Emeritus Professor, Tohoku University, Aoba-ku, Sendai, Japan PAO YU-KONG Chair Professor, Zhejiang University, Hangzhou, People’s Republic of China

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  • ArmanHoseinpur Fri Jan 10 2020

    A must-have one for solar Si producion!

    Almost the 1st book writen abou the Si ingot production summerizing the unidirectional solidification and singel crystal production of solar silicon. This is a must read book for those who are working on the solar Si production. This book introduces a lot of valubale references, suitng the researchers to get to know all the research institutes working on tis topic. According to the statestics the metallurgical process for solar Si production is on increase, which makes this book an important one to buy!