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A collaboration led by ICIQ's Palomares group deepens the understanding of the impact that changing the materials in a perovskite solar cell has on its performance. The results, published in the peer-reviewed journal Energy & Environmental Science will inform the design of the components of solar cells, thus increasing their commercial appeal.
Perovskite-based solar cells are the fastest-advancing solar technology to date. Since they were first used in 2009, perovskite solar cells have achieved high efficiencies (over 22% under standard solar irradiation) at low production costs. Although most of the perovskite components are optimized, there's still room for improvement. Especially in reference to the Hole Transport Materials (HTMs) employed.
Collaboration - Researchers - ICIQ - Palomares - Vidal
The collaboration, among researchers from ICIQ's Palomares and Vidal groups, the Physical Chemistry of Surfaces and Interfaces group at the Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and IMDEA Nanocienca, sheds light on the reasons behind the differences observed in perovskite solar cell performance by comparing four different HTMs that present close chemical and physical properties.
Perovskite-based solar cells are approaching the stability necessary to be trusted as potential commercial products under working conditions. The major concern is the materials used—particularly spiro-OMeTAD,the most widely used HTM, which is prone to degradation. Therefore, current research is focused on finding alternatives. "Scientists have been designing new molecules that could replace spiro-OMeTAD for years. Looking for molecules with similar electrical and optic characteristics than spiro-OMeTAD and hoping to get similar results. But...
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