Polyethylenimine ethoxylated interlayer-mediated ZnO interfacial engineering for high-performance and low-temperature processed flexible perovskite solar cells: A simple and viable route for one-step processed CH3NH3PbI3

GABr Post-Treatment for High-Performance MAPbI3 Solar Cells on Rigid Glass and Flexible Substrate

“…The main issues of the performance of flexible devices are the low FF due to the high series resistance (R s ), and the worse J sc affected by the surface properties the flexible substrate [ 63 ]. R s of the controlled and GABr-treated devices deposited on different substrates is summarized in Figure 9 f. This result indicates that GABr post-treatment can effectively reduce the R s of the devices, which can be attributed to the modified surface morphology of perovskite layer [ 33 ]. The obstacles in the development of flexible PSCs based on PEN-ITO or PET-ITO are the worse efficiency, brittleness of ITO and the relatively high cost.…”

“…However, the development of flexible PSCs still suffers from poor efficiency which is much lower than rigid PSCs. To the best of our knowledge, the state-of-the-art PCE of rigid MAPbI 3 -based PSCs has reached 21.88% [ 31 ] and several works have been carried out to improve the efficiency of flexible PSCs to over 18% [ 8 , 32 , 33 , 34 ]. Considering that the low-temperature manufacturing of GABr treatment (<150 °C) and the previous applications in improving the device performance, it is expected to utilize this optimization method to improve the efficiency of flexible devices [ 21 , 22 , 35 , 36 ].…”

Solution-Processed PEDOT:PSS/MoS2 Nanocomposites as Efficient Hole-Transporting Layers for Organic Solar Cells

“…In order to elucidate the origin of the improvement in the photovoltaic performance, especially both FF and J sc for PEDOT:PSS/FMoS 2 (5), we further calculated the resistance of the devices. In general, it is well known that lower series resistance (R S ) and higher shunt resistance (R SH ) are required to achieve higher FF in the solar cell device [64]. Based on the J–V curves obtained from the devices, it is clearly revealed that the device with PEDOT:PSS/FMoS 2 (5) as HTL showed the lowest R S while maintaining higher R SH , leading to enhancement in charge extraction.…”

Current advancements on charge selective contact interfacial layers and electrodes in flexible hybrid perovskite photovoltaics

“…It is worthy to mention that the thermal instability of lead halide perovskites is one of the key demerits of using ZnO as an ETL for F-PSCs [86]. To avoid the photoactive layer decomposition, Lim et al utilized a polyethyleneimine ethoxylated layer on ZnO to minimize the direct contact between the perovskite (MAPbI 3 ) and ETLs [87]. They obtained the PCE of 15.8% when compared to the control device (12.6%) for conventional planar PSCs and 11.9% for F-PSCs.…”