I’ve not been sharing enough of my “how cool is this?” moments, and believe me, I’ve had plenty of them in the digital and clean tech areas lately. I find this one very exciting: Michigan State researchers have developed a fully transparent solar cell that could be used for windows or device screens:
Instead of trying to create a transparent photovoltaic cell (which is nigh impossible), they use a transparent luminescent solar concentrator (TLSC). The TLSC consists of organic salts that absorb specific non-visible wavelengths of ultraviolet and infrared light, which they then luminesce (glow) as another wavelength of infrared light (also non-visible). This emitted infrared light is guided to the edge of plastic, where thin strips of conventional photovoltaic solar cell convert it into electricity. [Research paper: DOI: 10.1002/adom.201400103– “Near-Infrared Harvesting Transparent Luminescent Solar Concentrators”] …
So far, one of the larger barriers to large-scale adoption of solar power is the intrusive and ugly nature of solar panels — obviously, if we can produce large amounts of solar power from sheets of glass and plastic that look like normal sheets of glass and plastic, then that would be big.
The energy efficiency numbers are low, 1%, but they estimate they could go up to 5%. Figuring out how much cost this TLSC technology adds to large panes of glass and comparing that to alternative electricity prices is the next step in assessing its commercial viability. But the technology is seriously cool.