Photo of Rui Wang

Energy & sustainability

Rui Wang

Adding caffeine could improve the stability of perovskites.

Year Honored

Westlake University


Hails From

Perovskites have been a major focus of photovoltaic research in recent years because of their intriguing optoelectronic performance, but the poor stability of these synthetic materials has thwarted their commercialization. They quickly fall apart when out in the world. Rui Wang, 29, found that adding caffeine and its derivativesan idea that occurred to him while drinking coffeecould improve the stability of perovskites “from several hours to almost five years.” His next challenge? Making a perovskite solar cell that will last for decades.