Pbs cut off wavelength for cd simulator#
Table 5.7: I-V variation in Cd06Zn04S/ PbS cell as measured by solar simulator Table 5.6: Resistivity and conductivity of PbS thin films Table 5.5: Conductivity and resistivity of Cd x Zn1- x S thin films Table 5.4: Band gap from simulation for PbS with concentration Table 5.3: Experimental and calculated band gaps with refractive index for Cd x Zn1- x S Table 5.2: Simulated and calculated band gaps for Cd x Zn1- x S thin films
Table 5.1: Band gap variation of Cd x Zn1- x S with concentration x Table 4.2: Parameters for depositing PbS thin films Table 4.1: Parameters for depositing Cd x Zn1- x S thin films Muthoka for providing the Silver Paste for the photovoltaic cell fabrication and to all my other colleagues, “ you are the source of my inspiration for you make me believe that I am among those who think that Physics has great beauty and a scientist in his laboratory experimenting is not only a technician at work but he is also a child placed before a natural phenomenon which impresses him like a fairy tale in ancient days.” LIST OF TABLES I would like to give special thanks to Mr. Finally, I am grateful to Njiru, Kagiri, Omayio, Oketch, Munguti and Mugah who are my colleague students (Msc.) who acted as technical instructors. To my family and especially my wife Alice Mwango, thanks for your unconditional love and moral support throughout my studies. Eunice of chemistry department (Kenyatta University) for the assistance they offered to me on sample preparation techniques and the useful discussions related to my research. I also want to extend my heartfelt thanks to laboratory technicians, Mr. Njuguna for their immense support and encouragement during my work. My special thanks go to all members of physics department of Kenyatta University, all physics laboratory technicians not forgetting the chief technician, Mr. Olive Mugenda, for providing a conducive environment for research and an unlimited wireless internet service for timely access to information that was beneficial for this work. I acknowledge the Vice Chancellor of Kenyatta University, Prof. I recognize that they are prominent professionals in the field of solid state physics and semiconductor device fabrication at the department as well as good persons, who provided me a continuous support and guidance throughout my research work. My deepest appreciation and gratitude is dedicated to my research supervisors, Dr.
I dedicate this thesis to my father Mosiori, my late mother Nyaboke, my loving wife Mwango, my beautiful daughter Joyce, sons Ogoti, Okong’o and Mienya. 2.1 Survey on Cadmium Sulphide (CdS) thin filmsĢ.1.1 Electrical properties of CdS thin filmsĢ.1.2 Optical properties of CdS thin filmsĢ.2 Survey on lead sulphide (PbS) thin filmsģ.3 Energy band structure in semiconductorsģ.7 Strengths and limitation of thin films for photovoltaic cellsĤ.1.1 Chemicals for deposition of Cadmium Zinc Sulphide and Lead Sulphide thin filmsĤ.3.1 Deposition of cadmium zinc sulphide (Cd x Zn1- x S) thin filmsĤ.3.2 Deposition of lead sulphide (PbS) thin filmsĤ.4.1 Measurement of electrical propertiesĥ.1.1 Optical properties of cadmium zinc sulphide (Cd x Zn1- x S) thin filmsĥ.1.2 Optical properties of lead sulphide (PbS) thin filmsĥ.2 Electrical properties of the thin filmsĥ.2.1 Electrical properties of Cd x Zn1- x S thin filmsĥ.2.2 Electrical properties of PbS thin filmsĥ.3 Photovoltaic properties of Cd x Zn 1-x S / PbS cellĬHAPTER SIX CONCLUSIONS AND RECOMMENDATIONS