Polarity and moisture induced trans-grain-boundaries 2D/3D coupling structure for flexible perovskite solar cells with high mechanical reliability and efficiency

Abstract

To commercialize flexible perovskite solar cells (f-PSCs), they must achieve mechanical reliability apart from high power conversion efficiency (PCE) and long-term stability. 2D/3D stacking perovskite theoretically can improve the photovoltaic...

Perylene Monoimide Phosphorus Salt Interfacial Modified Crystallization for Highly Efficient and Stable Perovskite Solar Cells

“…However, under the same mechanical stress, the PCE of the SnO 2 /PMI-TPP-based PSC is decreased from 20.20 to 18.86%, and the corresponding performance parameters are shown in Table S3. During the process of a bending cycle, perovskite films will be torn to a certain extent; the fracture will hinder the transport and enhance the recombination of photo-induced charges at the fracture section, which will result in the voltage drop of the SnO 2 /PMI-TPP sample after bending cycles . In addition, after bending the flexible devices 1000 times, the PCE of the SnO 2 -based flexible device is less than 60% of the initial PCE, while the PCE of the SnO 2 /PMI-TPP-based device is 76% of the initial value, as shown in Figure i.…”

Amorphous F‐doped TiOx Caulked SnO2 Electron Transport Layer for Flexible Perovskite Solar Cells with Efficiency Exceeding 22.5%

“…[12,13] Hence it will be difficult to achieve their optimum charge transport performance, which becomes an important reason for the efficiency gap between f-PSCs and rigid PSCs. [14][15][16][17][18][19] Whether at the ETL/MHP interface or within the ETL, the enhancement in transporting and extraction of ETL-based photogenerated electrons has become a vital strategy to further improve the PCE and long-term stability of PSCs. Currently, tin(IV) oxide (SnO 2 ) has been demonstrated as an excellent electron transport layer (ETL) due to its favorable low-temperature processability, and wide bandgap with high optical transmittance in the visible light range, suitable band alignment with commonly used MHP absorbers, and decent chemical stability.…”

“…[ 12,13 ] Hence it will be difficult to achieve their optimum charge transport performance, which becomes an important reason for the efficiency gap between f‐PSCs and rigid PSCs. [ 14–19 ]…”

Perovskite Grain‐Boundary Manipulation Using Room‐Temperature Dynamic Self‐Healing “Ligaments” for Developing Highly Stable Flexible Perovskite Solar Cells with 23.8% Efficiency

“…1D perovskites, which are thermodynamically stable and kinetically labile, are considered suitable for effectively releasing the residual tensile strain in the perovskite. [ 23–29 ] Chen et al. used polymerizable propargylammonium to construct a 1D perovskite through the coordination between propargylammonium and PbI 2 .…”

“…1D perovskites, which are thermodynamically stable and kinetically labile, are considered suitable for effectively releasing the residual tensile strain in the perovskite. [23][24][25][26][27][28][29] Chen et al used polymerizable propargylammonium to construct a 1D perovskite through the coordination between propargylammonium and PbI 2 . The resultant 1D/3D heterostructured perovskite film released the residual tensile strain in the perovskite lattice and passivated the defects at the grain boundaries, thus significantly increasing the maximum power point (MPP) operational stability of the corresponding pero-SC.…”