Journal
NANO ENERGY
Volume 79, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2020.105452
Keywords
Perovskite solar cells; Perovskite/NiO-Graphene composite; NiO interface; Stability, Photocurrent density
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Funding
- National Research Foundation of Korea [2019R1H1A2080202]
- Ministry of Science and ICT
- National Research Foundation of Korea [2019R1H1A2080202] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study proposes an innovative approach to enhance the stability and performance of perovskite solar cells by utilizing functional composites, achieving high power conversion efficiency, photocurrent density, and long-term stability.
Perovskite solar cells (PSCs) demonstrated a record-high power conversion efficiency, but they have instability issues attributed to the degradation of materials and device performance. To overcome the instability problem and performance degradation, various methods have been proposed, but still need a comprehensive solution. Here, we propose an innovative way of insuring device performance and long-term stability by utilizing functional composites of perovskite, nickle oxide and graphene into device structures. We fabricated the PSCs based on MAPbI(3-x)Cl(x)/NiO-graphene photoactive composite and NiO interface layer. Compared to the pristine perovskite cells, the champion device based on the photoactive composites with NiO interface showed remarkably high photocurrent density of 25.9 mA/cm(2) (i.e., 95.2% of theoretical maximum) and power conversion efficiency of 20.8% without J-V hysteresis. More impressively, unencapsulated cells showed significant improvement of thermal- and photoand long-term air-stability with retaining 97-100% of the initial values of performance parameters over 310 days under ambient conditions.
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