Question

Solar Radiation Spectrum NVsitleInaed Sunlight at Top of the Atmosphere 1.5 5250"C Blackbody Spectrum Radiation at Sea Level 0.5 Mo co Hyo 250 500 750 1000 1260 1500 1750 200O 2250 2600 Wavelength (nm) 4. (15 points) Figure 3: Left: Schematic of Quantum Dot enhanced solar cells. Right: Solar spectrum. The strong and tunable resonant absorption and emission of quantum dots makes them promising candidates for enhancing the performance of solar panels. Imagine you want to build a solar panel using a coating of monodisperse cadmium sulfide (CdS) quantum dots; what radius should your quantum dots be to maximize the absorption of solar photons? Explain any assumptions you make in answering this question. (Data for CdS can be found on the last page, though you need only set up an appropriate expression for the radius symbolically).

Answer 1

ns- Th and lunable esonaut Quotos ptioo and andilata tor Ennti auit due to e Confinement of electvon ns ho han hu Aomal mateial is dejcndent on he szc of tic dob ventum in i

do Suraded i Soluin tavpt band ap) * Tr tẢ light İl Emites hom.oluțion) wim lat7CY do Cinau band ap