In recent decades, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has risen from 3.8% to 25.5%,
implies its potential commercialization. However, the stability issue is still a limitation for its actual application. For
efficient and stable PSCs, surface passivation of metal halide perovskite thin films has been demonstrated to be an effective
way. Herein, we illustrated that by using 4-fluorophen-ethyl ammonium iodide as a fluorinated aromatic organic spacer
cation (F-PEAI) for the surface defect passivation to enhance the efficiency and stability of PSCs devices. F-PEAI could
effectivity decrease the defect states and suppress non-radiative recombination through the ionic interaction, leading to
superior performance of the PSCs devices. The PCE was up to19.48 % after being treated with F-PEAI. The F-PEAI
treated PSCs also had better environmental stability, maintained about 80% of the original PCE after storage in ambient
atmosphere for 500 hours.
This paper reports a low-temperature thin-film encapsulation (TFE) process based on a low temperature atomic layer deposition ZrO2 layer for top-emission organic light-emitting devices (TEOLEDs). The barrier characteristics of TFE showed a lower water vapor transmission rate (WVTR) of 2.3 × 10−3 g/m2/day and a longer continuous operation lifetime of 6-folds compared to the device without TFE under identical environmental and driving conditions. Furthermore, the emitting light extraction of the device with barrier layers was improved compared to the bare device. The theoretical calculation data were consistent with the experimental results and showed the potential for designing optimized TFE structures for improving light transmission.
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