期刊
Journal of Materials Chemistry A
卷 3, 期 17, 页码 9160-9164出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta03684k
关键词
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资金
- National Research Foundation of Korea (NRF) - Korean government (MEST) [2012M3A6A7054861, 2014R1A4A1008474]
- National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2012M3A7B4049967]
- National Research Foundation of Korea [2012M3A6A7054861, 2012M3A6A7054855, 2014R1A4A1008474, 2012M3A7B4049986] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
MgO-coated TiO2 nanoparticle (NP)-based electron collecting layers were fabricated to prevent charge recombination at the methylamine lead iodide/TiO2 interface in perovskite solar cells. The open circuit voltage (V-oc) and fill factor (ff) of perovskite solar cells based on MgO-coated TiO2 charge collectors were 0.89 V and 71.2%, respectively. These values were 4.7% and 6.1% higher than the pure TiO2 based perovskite solar cells. Transient photovoltage decay data exhibited recombination times for MgO-coated TiO2 NP-based perovskite solar cells about three times longer than those of TiO2 NP based solar cells. The longer recombination time was responsible for enhancing the V-oc and ff of MgO-coated TiO2 NP-based perovskite solar cells. By employing a MgO nanolayer, we observed that the power conversion efficiency (PCE) was increased from 11.4% to 12.7%, demonstrating that MgO ultrathin nanolayers are able to efficiently retard charge recombination in perovskite solar cells.
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