Rongrong Chen figures ESM from Efficiency enhancement of Cu₂ZnSnS₄ solar cells via surface treatment engineering

Characterizations of structure and morphology of CZTS thin films and solar cell

High Performance of Perovskite Solar Cells via Catalytic Treatment in Two-Step Process: The Case of Solvent Engineering

Currently, the potential mechanism of the solvent-assisted crystallization for mixed cations perovskite thin film (FA_<i>x</i>MA_1–<i>x</i>PbI₃) prepared via two-step solution-process still remains obscure. Here, we clarified the molecular-competing-reacted process of NH₂CHNH₂I (FAI) and CH₃NH₃I (MAI) with PbI₂(DMSO)_<i>x</i> complex in dimethyl sulfoxide (DMSO) and diethyl ether (DE) catalytic solvent system in the sequential two-step solution-process. The microscopic dynamics was characterized via the characterizations of in situ photoluminescence spectra. In addition, we found that the thermal stability of the perovskite films suffered from the residual solvent with high boiling point, for example, DMSO. The further DE treatment could promote the volatility process of DMSO and accelerate the crystallization process of perovskite films. The highest PCE over 19% with slight hysteresis effect was eventually obtained with a reproducible FA_0.88MA_0.12PbI₃ solar cell, which displayed a constant power output within 100 s upon light soaking and stable PCE output within 30 d in the thermal stability test

Hysteretic Behavior upon Light Soaking in Perovskite Solar Cells Prepared via Modified Vapor-Assisted Solution Process

Recently, the organic–inorganic hybrid perovskite solar cells exhibit rapidly rising efficiencies, while anomalous hysteresis in perovskite solar cells remains unsolvable. Herein, a high-quality perovskite thin film is prepared by a modified vapor-assisted solution process, which is a simple but well-controllable method proven to be capable of producing a thin film with full surface coverage and grain size up to micrometers. The as-fabricated perovskite solar cell has efficiency as high as 10.2%. The hysteresis effects of both planar and mesoscopic TiO₂-based perovskite solar cells have been comprehensively studied upon illumination. The results demonstrate that mesoporous-based perovskite cells combined with remarkable grain size are subject to alleviating the hysteresis effects in comparison to the planar cells. Likewise, mesoscopic TiO₂-based perovskite cells perform independently of illumination and bias conditions prior to the measurements, whereas the planar cells display a reversible behavior of illumination and applied bias-dependent I–V curves. The present study would refer strip road for the stability study of the perovskite solar cells

Visible Photoluminescence Components of Solution-Grown ZnO Nanowires: Influence of the Surface Depletion Layer

Arrays of electrodeposited ZnO nanowires (NWs) were used to illustrate the dependence of the ZnO visible photoluminescence (PL) emission on the extension of the surface depletion layer and obtain further insight into the localization of the related states. With this goal in mind, three sets of measurements were carried out: (i) analysis of the PL spectra of ZnO:Cl NWs as a function of their carrier concentration; (ii) analysis of the PL spectra of ZnO:Cl/ZnO core–shell NWs as a function of the thickness of their intrinsic ZnO shell; (iii) in situ analysis of the PL dependence on the polarization of ZnO:Cl photoelectrodes. The obtained experimental results evidenced that the yellow and orange emissions from electrodeposited ZnO NWs are correlated with the extension of the NWs surface depletion region. This result points out the surface localization of the states at the origin of these transitions. On the other hand, the green emission that dominates the visible part of the PL spectra in annealed ZnO NWs showed no dependence on the surface band bending, thus pointing toward its origin in the bulk

Rotatable Skeleton for the Alleviation of Thermally Accumulated Defects in Inorganic Perovskite Solar Cells

The stability of perovskite solar cells has been identified as the bottleneck for their industrialization. With an aim at tackling this challenge, we self-synthesize a thus-far unreported linearly rotatable structure perovskite, i.e., TrMAPbX3 (X = Br, I). The as-prepared hybrid perovskite is observed to demonstrate extremely high stability during device operation with high electric field strength and high temperature, which is associated with the good lattice-matching heterojunction structure between the linearly rotatable TrMAPbX3 structure and 3D inorganic perovskite domain within a wide temperature range. The tight-fitting interface structure is devoted to inhibiting the accumulation of vacancy defects during device operation, which further avoids the δ-phase transition and charge transport resistance. Accordingly, we realize a CsPbI3–xBrx inorganic perovskite-based solar cell with power conversion efficiency (PCE) of 20.59%, extending the remarkably high thermal stability to 192 h (85 °C and relative humidity of 25%) and 3055 h (25 °C and relative humidity of 25%)

Rotatable Skeleton for the Alleviation of Thermally Accumulated Defects in Inorganic Perovskite Solar Cells

The stability of perovskite solar cells has been identified as the bottleneck for their industrialization. With an aim at tackling this challenge, we self-synthesize a thus-far unreported linearly rotatable structure perovskite, i.e., TrMAPbX3 (X = Br, I). The as-prepared hybrid perovskite is observed to demonstrate extremely high stability during device operation with high electric field strength and high temperature, which is associated with the good lattice-matching heterojunction structure between the linearly rotatable TrMAPbX3 structure and 3D inorganic perovskite domain within a wide temperature range. The tight-fitting interface structure is devoted to inhibiting the accumulation of vacancy defects during device operation, which further avoids the δ-phase transition and charge transport resistance. Accordingly, we realize a CsPbI3–xBrx inorganic perovskite-based solar cell with power conversion efficiency (PCE) of 20.59%, extending the remarkably high thermal stability to 192 h (85 °C and relative humidity of 25%) and 3055 h (25 °C and relative humidity of 25%)

Rotatable Skeleton for the Alleviation of Thermally Accumulated Defects in Inorganic Perovskite Solar Cells

The stability of perovskite solar cells has been identified as the bottleneck for their industrialization. With an aim at tackling this challenge, we self-synthesize a thus-far unreported linearly rotatable structure perovskite, i.e., TrMAPbX3 (X = Br, I). The as-prepared hybrid perovskite is observed to demonstrate extremely high stability during device operation with high electric field strength and high temperature, which is associated with the good lattice-matching heterojunction structure between the linearly rotatable TrMAPbX3 structure and 3D inorganic perovskite domain within a wide temperature range. The tight-fitting interface structure is devoted to inhibiting the accumulation of vacancy defects during device operation, which further avoids the δ-phase transition and charge transport resistance. Accordingly, we realize a CsPbI3–xBrx inorganic perovskite-based solar cell with power conversion efficiency (PCE) of 20.59%, extending the remarkably high thermal stability to 192 h (85 °C and relative humidity of 25%) and 3055 h (25 °C and relative humidity of 25%)

Rotatable Skeleton for the Alleviation of Thermally Accumulated Defects in Inorganic Perovskite Solar Cells

The stability of perovskite solar cells has been identified as the bottleneck for their industrialization. With an aim at tackling this challenge, we self-synthesize a thus-far unreported linearly rotatable structure perovskite, i.e., TrMAPbX3 (X = Br, I). The as-prepared hybrid perovskite is observed to demonstrate extremely high stability during device operation with high electric field strength and high temperature, which is associated with the good lattice-matching heterojunction structure between the linearly rotatable TrMAPbX3 structure and 3D inorganic perovskite domain within a wide temperature range. The tight-fitting interface structure is devoted to inhibiting the accumulation of vacancy defects during device operation, which further avoids the δ-phase transition and charge transport resistance. Accordingly, we realize a CsPbI3–xBrx inorganic perovskite-based solar cell with power conversion efficiency (PCE) of 20.59%, extending the remarkably high thermal stability to 192 h (85 °C and relative humidity of 25%) and 3055 h (25 °C and relative humidity of 25%)

Rotatable Skeleton for the Alleviation of Thermally Accumulated Defects in Inorganic Perovskite Solar Cells

The stability of perovskite solar cells has been identified as the bottleneck for their industrialization. With an aim at tackling this challenge, we self-synthesize a thus-far unreported linearly rotatable structure perovskite, i.e., TrMAPbX3 (X = Br, I). The as-prepared hybrid perovskite is observed to demonstrate extremely high stability during device operation with high electric field strength and high temperature, which is associated with the good lattice-matching heterojunction structure between the linearly rotatable TrMAPbX3 structure and 3D inorganic perovskite domain within a wide temperature range. The tight-fitting interface structure is devoted to inhibiting the accumulation of vacancy defects during device operation, which further avoids the δ-phase transition and charge transport resistance. Accordingly, we realize a CsPbI3–xBrx inorganic perovskite-based solar cell with power conversion efficiency (PCE) of 20.59%, extending the remarkably high thermal stability to 192 h (85 °C and relative humidity of 25%) and 3055 h (25 °C and relative humidity of 25%)