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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Commun 2017 ; 8 (ä): ä Nephropedia Template TP
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Diffusion engineering of ions and charge carriers for stable efficient perovskite solar cells #MMPMID28604673
Bi E; Chen H; Xie F; Wu Y; Chen W; Su Y; Islam A; Grätzel M; Yang X; Han L
Nat Commun 2017[]; 8 (ä): ä PMID28604673show ga
Long-term stability is crucial for the future application of perovskite solar cells, a promising low-cost photovoltaic technology that has rapidly advanced in the recent years. Here, we designed a nanostructured carbon layer to suppress the diffusion of ions/molecules within perovskite solar cells, an important degradation process in the device. Furthermore, this nanocarbon layer benefited the diffusion of electron charge carriers to enable a high-energy conversion efficiency. Finally, the efficiency on a perovskite solar cell with an aperture area of 1.02?cm2, after a thermal aging test at 85?°C for over 500?h, or light soaking for 1,000?h, was stable of over 15% during the entire test. The present diffusion engineering of ions/molecules and photo generated charges paves a way to realizing long-term stable and highly efficient perovskite solar cells.