CHEM01200604009 Sreejith Kaniyankandy - Homi Bhabha ...

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83 Chapter 3
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Charge Transfer Dynamics in Quantum
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DECLARATION I, hereby declare that
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ACKNOWLEDGEMENTS It is my privilege
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1.3.5. Defect Mediated Relaxation 2
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2. 8. 4. White Light Generation- 45
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6.2. Experimental 6.2.1.Synthesis o
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devices based on QDs it has been sh
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Furthermore generation of pump (~40
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shell). This clearly indicated that
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12. V. I. Klimov, J. Phys. Chem. B,
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1.13 Reactant and Product Potential
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light. Inset: Kinetic traces monito
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6.5 Transient decay kinetics of gra
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at 670 nm after exciting at 400 nm
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ABBREVIATIONS BET BQ CB CCD CdS CdT
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1 Chapter 1
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3 size dependent optical properties
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5 1.2. Physics of Semiconductors 1.
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7 As seen from the schematic, poten
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9 Substituting this in Schrödinger
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11 ( r, r ) ( r ) ( r ) (1.13) e
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13 E E E 2 2 2 EX ne, le nh,
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15 spherical symmetry of field. The
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17 gE ( ) 2Em 2 3 3 (1.25) For a
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19 1.3.2. Electron-Hole energy tran
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21 Impact Ionization Figure 1.7. Sc
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23 understanding on mechanistic asp
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25 carriers are unable to sample th
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27 CB VB QD Metal Figure. 1. 10. Sc
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29 energy barrier. Therefore it is
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31 1 f q 2 A qB (1.30) 2 In equa
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33 Vibrational contribution can be
Page 74 and 75: 35 1. 7. 1. Electron Injection ET i
Page 76 and 77: 37 Under assumption of invariance o
Page 78 and 79: 39 distribution. To achieve good si
Page 80 and 81: 41 initially achieved monodispersit
Page 82 and 83: 43 and rate of charge transfer acro
Page 84 and 85: 45 1.32 P. V. Kamat, J. Phys. Chem.
Page 87: 47 Chapter 2
Page 90 and 91: 49 chemical species. Since a partic
Page 92 and 93: 51 fluorescence forms an important
Page 94 and 95: 53 eliminated by use of standard wh
Page 96 and 97: 55 sample. Raman spectroscopy is ba
Page 98 and 99: 57 will appear bright and region wi
Page 100 and 101: 59 volatile solvent is drop casted
Page 102 and 103: 61 spots arise from diffraction fro
Page 104 and 105: 63 The electrical signal is then ch
Page 106 and 107: 65 delayed and inverted. The two si
Page 108 and 109: 67 Pump-probe technique is one of t
Page 110 and 111: 69 Amplifier Jade Stretcher fs Osci
Page 112 and 113: 71 Figure 2.6. Optical layout of Ti
Page 114 and 115: 73 Grating Convex Mirror Concave Mi
Page 116 and 117: 75 changes the polarization from ho
Page 118 and 119: 77 Grating Output Input Mirror Grat
Page 120 and 121: 79 μJ has a very high peak power.
Page 122 and 123: 81 2.6. Dynamical Theory of X-Ray D
Page 127 and 128: 84 CHAPTER 3 Charge Carrier Dynamic
Page 129 and 130: 86 density of states. However, if o
Page 131 and 132: 88 3.3. Results & Discussion 3.3.1.
Page 133 and 134: 90 Absorbance (a.u) 1,0 d 2 1 c b a
Page 135 and 136: 92 The spectrum has been shown in t
Page 137 and 138: 94 injection dynamics where the con
Page 139 and 140: 96 dye gave a pulse width limited i
Page 141 and 142: 98 alizarin has extended -electron
Page 143 and 144: 100 n=5 n=4 n=3 n=2 n=1 n=0 trappin
Page 145 and 146: 102 energy change is the only facto
Page 147 and 148: 104 2. Nazeeruddin, M. K.; Kay, A.;
Page 149: 106 32. Duncan, W. R; Prezhdo, O. V
Page 153 and 154: 108 CHAPTER 4 Effect of Size Quanti
Page 155 and 156: 110 impossible in bulk systems. For
Page 157 and 158: 112 4.3. Results & Discussion: 4.3.
Page 159 and 160: 114 nm which exactly matched with t
Page 161 and 162: 116 of 3.2ps (~90%) which can be at
Page 163 and 164: 118 Figure 3: Panel A: Normalized k
Page 165 and 166: 120 dynamics of hot electron. The p
Page 167 and 168: 122 constants of τ 1 = 7ps (53%),
Page 169 and 170: 124 4.4 Conclusion In conclusion we
Page 171: 126 4.15. Ekimov, A. I.; Hache, F.;
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128 CHAPTER 5 Charge Carrier Dynami
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130 CdSe/ZnTe. Feldman and coworker
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132 by reducing Se with NaBH 4 with
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134 broadening in the present case
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136 vis absorption spectra of the t
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138 5.3.3. Time resolved emission s
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140 Sample t 1 (ns) t 2 (ns) t 3 (n
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142 can be attributed to absorption
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144 5.3.5. Transient absorption stu
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146 However, due to staggered band
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148 Scheme 5.1: Schematic represent
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150 are the reason for that contrib
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152 5.10. L. P. Balet, S. A. Ivanov
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154 Chapter 6
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156 Recently several methods like c
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158 6.2.2. Reduction of Graphene Ox
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160 isolated CdTe QD over graphene
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162 Figure 6.3: Time-resolved emiss
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164 carriers on laser excitation. I
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166 absorption in the present studi
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168 increases from 33.3% to 61.8% i
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170 as compared to that of GO. It i
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172 components could come from trap
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174 A (m O.D.) 0 -10 -20 -30 a b Cd
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176 The cooling dynamics does not s
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178 The study clearly shows that th
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180 From emission studies both stea
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182 6.18. C. X. Guo, H. Bin Yang, Z
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184 CHAPTER 7 Summary and Outlook 7
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186 bleach growth times from 500fs
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188 Study of interfacial electron t
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190 Chapter 8 List of Publications
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