Semiconductor breakthrough overcomes major challenge in capturing solar energy
Solar energy currently faces a critical limitation: materials that absorb light more strongly also tend to be less efficient at turning captured light into electricity.
Solar cells rely on materials called semiconductors, which absorb sunlight and use its energy to free tiny negatively charged particles called electrons, leaving behind positively charged gaps known as holes. To produce electricity, these charges must be collected before an electron and a hole meet and cancel each other out, wasting the energy they carry.
This creates a fundamental challenge. Semiconductors that absorb light more strongly also tend to lose their charges more quickly. This trade-off limits how efficiently solar cells can turn sunlight into electricity.
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