Defect healing via a gradient cooling strategy for efficient all-inorganic perovskite solar cells

Guo

et al. 2022

J. Mater. Chem. C

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The synergistic effect of defect passivation and energy level adjustment for low-temperature carbon-based CsPbI₂Br perovskite solar cells

Guo

et al. 2022

J. Mater. Chem. C

“…For the control device, the recombination resistance ( R rec ) is 1.64 kΩ (Table S3), and it is increased to 3.22 kΩ in the PAT device, demonstrating that the PAT process is beneficial for suppressing charge carrier recombination. To further explore the charge carrier transport across the interface, Mott–Schottky (M–S) plots of devices were measured and the built-in voltages ( V bi ) were extracted from the corresponding C –2 – V curves . It can be seen from Figure d that the PAT device shows a larger V bi (1.08 V vs 1.06 V) than the control device.…”

Section: Resultsmentioning

confidence: 99%

Enhancing Charge Carrier Transport in the Carbon-Electrode-Based CsPbI₂Br Perovskite Solar Cells via I/Br Homogenization Process Modulation and Oleic Acid Surface Passivation

ACS Appl. Energy Mater.

Zhao

et al. 2023

Self Cite

The carbon-electrode-based CsPbI2Br perovskite solar cells (C-PSCs) are promising photovoltaic technology because of their enhanced stability and low cost. However, the CsPbI2Br film suffers from uneven surface morphology with stripes and the defect-rich surface, which are detrimental to the charge carrier transport between perovskite and carbon. Here, we demonstrate that the formation of stripes is directly related to the I/Br homogenization process during annealing. By introducing a pre-annealing treatment before high temperature annealing, the I/Br homogenization process is modulated and the stripe is successfully wiped off. Besides, enhanced charge carrier transport in the C-PSCs is achieved. Oleic acid (OA) is then introduced to modify the stripe-free perovskite film surface. It is revealed that the carboxyl group in the OA molecule can passivate the undercoordinated Pb ions, leading to further improved charge carrier transport. Eventually, a power conversion efficiency (PCE) of 15.57% is achieved, which is among the highest PCE for the CsPbX3-based C-PSCs. This work demonstrates that combining surface planarization with surface passivation is an effective strategy for developing highly efficient C-PSCs.

“…In addition, several novel strategies have also been attempted to fabricate CsBX 3 , such as annealing process optimization, [37,130,[166][167][168][169] spray-coating process, [170,171] intermediate phase assisted sequential deposition, [172] gradient cooling process, [173] benign pinholes, [162] light-processing technology, [159] substrate optimization (moth-eye antireflector and muscovite), [174,175] fluxmediated crystal growth strategy, [176] drop-coating method, [177] halide exchange, [178] direct molecule substitution, [179] ambient environment fabrication, [117,180] phase transition induced method, [131] two-step infiltration-spinning method, [181] mist deposition method, [182] hybrid CVD (HCVD), [183] single-source electron beam evaporation, [183,184] UV-ozone post-treatment, [185] air blowing recipe, [186] two-step sintering (TSS) method, [133] electrodeposition, [187] hot-flow-assisted spin-coating approach, [39] intermolecular exchange strategy, [188] hot-pressing method, [189] and so on.…”

Section: Fabrication Technique Optimizationmentioning

confidence: 99%

Recent Progress of Carbon‐Based Inorganic Perovskite Solar Cells: From Efficiency to Stability

Advanced Energy Materials

et al. 2022

Organic–inorganic hybrid perovskite solar cells (PSCs) are regarded as a promising next‐generation photovoltaic technology. However, poor device stability limits their commercialization. Carbon‐based inorganic PSCs (C‐IPSCs) can meet stability challenge owing to the absence of organic components. Meanwhile, the hydrophobic carbon materials as hole transport layers and back electrodes simplify fabrication process, decrease costs, and protect devices from moisture erosion. Since the first attempt for C‐IPSCs in 2016, a series of strategies have been proposed to improve device performance, including the fabrication technique optimization, solvent engineering, composition engineering, interface engineering, charge transport layer optimization, and so on, and the power conversion efficiency of C‐IPSCs are rapidly increased from initial 5% to exceeding 15%. In this review, the recent progress of C‐IPSCs is summarized, the existing challenges in this field are discussed, followed by a prospect for future development.