Quality of perovskite performance boost by researchers 

Solar cells require slimming down. Solar cells are absorbing photons from sunlight and transform their energy to move electrons. This enabling the production of clean energy and offering a dependable route to help protect change of climate. However, most of the solar cells used extensively today are very thick and stiff. These limit their application, flat the surfaces, and maximize the cost to make solar cells. 

Thin film solar cells could 1/100th thick and flexible enough to festoon surfaces starting from sleek car to clothing. Scientists are moving beyond the semiconductor compounds to make thin-film cells. The compounds could extensively adopt to perform in today’s technology. Scientists at the University of Washington report that a prototype semiconductor thin-film has best solar cell materials at emitting light, that is published in the online journal Nature Photonics. 

co-author and UW chemical engineering professor Hugh Hillhouse, who is also a faculty member with both the UW's Clean Energy Institute and Molecular Engineering and Sciences Institute said that it may sound indifferent since solar cells absorb light and turn into electricity, but the ultimate solar cell materials are excellent at emitting light. In fact, the more they emit light, the more voltage they generate. 

The UW group accomplished a record performance in these materials that is called as halide perovskite, by treating chemically through a method called surface passivation. This treats imperfections and minimizes the likelihood. This absorbed photons will be finished wasted rather than converted to beneficial energy. 

co-author David Ginger, a UW professor of chemistry and chief scientist at the CEI said that the major problem with perovskite solar cells is that too much-absorbed sunlight was ending up as wasted heat, that does not use electricity. They are hopeful that surface passivation strategies will help to improve the stability and performance of perovskite solar cells.

Ginger's and Hillhouse's communities worked together to demonstrate the passivation of perovskites surface that could make this material the best for thin-film solar cells among them. 

They researched various chemicals for passivation surface, before finding an organic compound called as acronym TOPO. This boosted perovskite performance to levels semiconductors approaching the excellent gallium semiconductors. Braly said that their measurements observing the potential with which passivated hybrid perovskite absorb and emit light show that there are no inherent thing flaws combating solar cell developments. The researchers have provided a path to harness the sun’s energy that is already demonstrated by Perovskites.