Ultrathin CIGS cell based on tungsten disulfide promises 25.7% efficiency

The novel solar cell uses tungsten sulfide as the back surface field layer. According to its creators, this layer can be included in conventional CIGS solar cells to improve their efficiency and reduce the absorber material's cost. Researchers from the Visvesvaraya National Institute of Technology in India have proposed a new copper indium gallium diselenide (CIGS) solar cell structure using tungsten disulfide (WS2) as the back surface field (BSF) layer. BSF layers consist of a higher doped region at the rear surface of the solar cell and are commonly used to increase a device's voltage. WS2 ...

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