Trap passivation and suppressed electrochemical dynamics in perovskite solar cells with C60 interlayers
نویسندگان
چکیده
In this study, we quantify the impact of C60-passivation layers in Cs0.15FA0.85PbI2.75Br0.25 double-cation perovskite solar cells. We apply a combination impedance spectroscopy, photoluminescence (PL) and X-ray diffraction (XRD) to identify origin for increase power conversion efficiencies operational stability cells fabricated with C60/ZnO electron transport layer (ETL) versus reference ZnO ETL. XRD reveals an PbI2 while PL spectroscopy Br-rich regions bulk devices containing C60 interlayers. electrochemical dynamics both cell architectures. Solar ETL demonstrate less pronounced slower spectra than conclude that leads formation PbI2-rich domains absorber layer, resulting reduced recombination losses improved stability.
منابع مشابه
Identification of Trap States in Perovskite Solar Cells.
Thermally stimulated current (TSC) measurements are used to characterize electronic trap states in methylammonium lead iodide perovsite solar cells. Several TSC peaks were observed over the temperature range from 20 K to room temperature. To elucidate the origins of these peaks, devices with various organic charge transport layers and devices without transport layers were tested. Two peaks appe...
متن کاملEfficient perovskite/fullerene planar heterojunction solar cells with enhanced charge extraction and suppressed charge recombination.
Alcohol soluble titanium chelate TIPD (titanium (diisopropoxide) bis(2,4-pentanedionate)) was used as an electron transporting layer to form an ohmic contact with the negative electrode, aiming to enhance the charge extraction and suppress the charge recombination for high performance CH3NH3PbI3/PCBM-based PHJ perovskite solar cells. The TIPD layer shows excellent suitability to CH3NH3PbI3 pero...
متن کاملEfficiency enhancement of planar perovskite solar cells by adding zwitterion/LiF double interlayers for electron collection.
Double interlayers consisting of a zwitterionic small molecule layer and a LiF layer were introduced between the electron transport layer and the cathode of perovskite solar cells. The double interlayers improve the photovoltaic efficiency to 13.2%, which is higher than that of control devices without the double interlayer (9.2%) or with LiF (11.0%) or rhodamine 101 zwitterion (12.1%) alone.
متن کاملPerovskite Solar Cells
Two-dimensional hybrid perovskites are used as absorbers in solar cells. Our first-generation devices containing (PEA)2(MA)2[Pb3I10] (1; PEA=C6H5(CH2)2NH3 , MA= CH3NH3 ) show an open-circuit voltage of 1.18 V and a power conversion efficiency of 4.73%. The layered structure allows for high-quality films to be deposited through spin coating and high-temperature annealing is not required for devi...
متن کاملAdvances in Perovskite Solar Cells
Organolead halide perovskite materials possess a combination of remarkable optoelectronic properties, such as steep optical absorption edge and high absorption coefficients, long charge carrier diffusion lengths and lifetimes. Taken together with the ability for low temperature preparation, also from solution, perovskite-based devices, especially photovoltaic (PV) cells have been studied intens...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Electrochimica Acta
سال: 2022
ISSN: ['1873-3859', '0013-4686']
DOI: https://doi.org/10.1016/j.electacta.2022.141215