Uses of Silicon (Si) in Everyday Life

Silicon at work around you

Every use below comes straight from the full Silicon study page, where each point also carries the chemistry behind it and an exam-style question. Skim the list here; open the full page when revision time comes.

Uses of Silicon in the study notes

• Computer and smartphone chips — every processor and memory chip is carved from a paper-thin wafer of single-crystal silicon, its conductivity fine-tuned by doping with boron and phosphorus.
• Solar (photovoltaic) panels — the solar home systems that light the off-grid chars, haors and hill tracts of Bangladesh all lean on silicon wafers that turn sunlight straight into electricity.
• Glass — melting quartz sand ($\mathrm{SiO_{2}}$) with soda ash and limestone makes the soda-lime glass of windows, bottles and every flask in a school laboratory.
• Silicone sealants and greases — the rubbery sealing bead around bathroom tiles, the grease inside phone cases and baking moulds all come from silicon-based silicone polymers.

Where you meet it

• A handful of sand from Cox’s Bazar beach is mostly grains of quartz — crystalline silicon dioxide — polished smooth by the waves of the Bay of Bengal.
• Every concrete wall, clay brick and granite doorstep of a Bangladeshi town is packed with silicate minerals built around silicon atoms.
• The dark chip beneath a phone’s back cover and the blue-black panel on a village roof are both silicon doing its two most famous jobs.