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- Solved Silicon films become better electrical conductors - Chegg
Silicon films become better electrical conductors when they are illuminated by photons with energies of 1 14 eV or greater This behavior is called photoconductivity What is the corresponding photon wavelength? In what portion of the electromagnetic spectrum does it lie?
- Solved 1. Quasi-Fermi levels and photoconductivity. A Si - Chegg
Quasi-Fermi levels and photoconductivity A Si sample with 1016 cm3 donors is optically excited such that 1019 cm3 EHPS are generated per second uniformly in the sample The laser causes the sample to heat up to 450 K, which leads ton = 1014 cm3 Find the quasi-Fermi levels for electrons and holes What is the photoconductivity? 12 cm2 s, Dn 36
- Solved 5. 23 Photoconductivity and speed Consider two p-type - Chegg
5 23 Photoconductivity and speed Consider two p-type Si samples both doped with 105 B atoms cm- Both have identical dimensions of length L (I mm), width W (I mm), and depth (thickness) D (0 1 mm) One sample, labeled A, has an electron lifetime of 1 us whereas the other, labeled B, has an electron lifetime of 5 us
- Solved Photoconductivity is an optical and electrical - Chegg
Answer to Photoconductivity is an optical and electrical Photoconductivity is an optical and electrical phenomenon in which a material becomes more electrically conductive subsequent to the absorption of electromagnetic radiation such as visible light, ultraviolet light, infrared light, or gamma radiations (1)
- 4. OPTICAL ABSORPTION AND PHOTOCONDUCTIVITY (A). Use - Chegg
Question: 4 OPTICAL ABSORPTION AND PHOTOCONDUCTIVITY (A) Use Fig 4 1 and appendix III (4 2) to find the following for GaAs an CdS: i) The wavelength corresponding to their bandgap energy (Eg), and ii) The wavelength corresponding to an absorption coefficient α=1000 cm−1 (в)
- Solved 516 CHAPTER 5SEMICONDUCTORS 5. 23 Photoconductivity - Chegg
516 CHAPTER 5SEMICONDUCTORS 5 23 Photoconductivity and speed Consider two p-type Si samples both doped with 10'5 B atoms cm Both have identical dimensions of length L (1 mm), width W (I mm), and depth (thickness) D (o One sample, labeled A has an electron lifetime of 1 μs whereas the other, labeled B lifetime of 5 us a
- Solved 2. OPTICAL ABSORPTION AND PHOTOCONDUCTIVITY (A). Use - Chegg
Question: 2 OPTICAL ABSORPTION AND PHOTOCONDUCTIVITY (A) Use appendix III in the text book and Fig2 1 to find the bandgap energy Eg, wavelength 1 at Eg, and the i corresponding to absorption coefficient a = 3000 cm of the following semiconductors: Si, Ge, GaAs
- Solved What is photoconductivity? Discuss a simple model - Chegg
What is photoconductivity? Discuss a simple model of photoconductor Show that sensitive photo conductors should have long response time
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