A lightweight solar cell that can be draped over a soap bubble has been constructed by researchers in the USA. The thinnest, lightest device is just 1.3 micrometers thick and weighs a mere 3.6 grams per square meter. Vladimir BuloviÄ‡, Annie Wang and Joel Jean of the Massachusetts Institute of Technology used vapor deposition to fabricate the gossamer organic solar panel from tetraphenyldibenzoperiflanthene (DBP). Perovskites or quantum dots might be fabricated into devices using their approach. Such technology could broaden considerably the utility of solar power.