Reliable and resilient perovskite solar cell products

• Perovskite solar cells are attracting attention as the next-generation solar battery material thanks to their reduced handling price and also outstanding photovoltaic or pv quality. Nevertheless, it is hard to advertise them due to the fact that their essential product-- perovskite-- is susceptible to light as well as wetness.

Recently, a POSTECH study group has established a natural spacer molecular additive that can enhance both the photoelectric effectiveness as well as security of perovskite.

A POSTECH study group led by Professor Kilwon Cho and Ph.D. candidate Sungwon Song of the Department of Chemical Engineering has actually done well in fabricating perovskite solar cells that are very reliable and stable by considerably decreasing the concentration of interior problems in the crystals in addition to boosting the moisture resistance of perovskite by presenting a brand-new natural spacer particle additive in the perovskite crystal. The research study was published as a cover paper in the most recent concern of Advanced Energy Materials, one of one of the most reliable journals in the field of power.

By adding natural spacer ions to address the trouble, the research team created a crossbreed perovskite photovoltaic or pv layer where two- as well as three-dimensional perovskite coexist. Organic spacers produce two-dimensional perovskite frameworks on the surface of 3-D perovskite crystals. These frameworks function as stabilizing layer that increases resistance to dampness as a result of its home of warding off water.

On top of that, it was discovered for the first time that this newly introduced natural spacer decreases mechanical tension of the two- and also three-dimensional perovskite crystal interfaces, hence promoting the nuclear manufacturing as well as growth of the 3-D perovskite crystal. Because of this, the internal issues of the photoreactive layer-- the 3-D perovskite crystals-- have actually been significantly decreased.

The solar cells established by the research study group achieved 21.3 % efficiency as well as protected moisture security to maintain more than 80% of their first effectiveness also after 500 hours under 60% of family member moisture conditions.

" This research has actually offered a new perspective on organic spacer molecular layout for the understanding of high executing and also secure perovskite solar cells," remarked Professor Kilwon Cho that led the research. He included, "It is anticipated to be a source technology that can add to the commercialization of perovskite solar cell technology."