University:
Swansea University
Course:
EGA109 | Introductory Organic Chemistry
Academic year:

2023
Views:

471

Pages:

2
Author:

Sanjeev K

Construction Grätzel cell A range of organic dyes are used. eg. Ruthenium - Polypyridine, Indoline dye melal free organic dye Extracted from fords such as hibisers tea, Einned sumurer fruits, blackberries. Construction 2 transparent glan plates are perforated on one side with transparent thin layer of Conducting material. a Onke plate coated with graphite ly other wuth Tig. A lye is then adsorbed onto the Tig layer by. immersing the plate into a dye solution of 104m in alcohol for 10 min (approx). Plates are then carefully sandhuiched bogether Cy secured using paper clip. lete the cell a drop of To complete Es added blw plates. lodide electiolyte Working Prinaple DSSC Four bare steps: llofit skorption, é injection, transportation of carrier cy collection of current Sunlight energy (photon of light passes thru Tia layer ay absorbed by photsogalaphitisensitizer. Due to photon absorption, è's get prourled from ground stale (dye) to excited state (ly of dye Grated es with lifetime of manose range ane injected ints conduction band of nano-porous TiO2 electrode which lis below ixuted state of dye. "As a result, the dye gets oxidized. Dye ✓ Dye thi Dye Dye*++ e (TiO₂) Advantages Works at uwider 's win low light Long life. • Good price/performance ratio Low cost Mechanical Robustness. Lowers electricity bills Operates at lower internal temperatures. Disadvantages DSSC design is the use of liquid electrolyte. • which has lemp stability problems. 4 Costly ruthenium (dye), Pt (catalyst). electrolyte soln contains volatile rigamio compounds (or voc's)