PbS/CdS heterojunction thin layer affords high-performance carbon-based all-inorganic solar cells

Xu, Yongzhao; Li, Guodong; Li, Ruoshui; Jing, Yu; Zhang, Huayan; Wang, Xin; Du, Zhenbo; Wu, Jihuai

doi:10.1016/j.nanoen.2022.106973

Cited by 64 publications

(51 citation statements)

References 63 publications

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“…Nyquist plots of CsPbIBr 2 PSCs fabricated without and with use of AG HSUL measured under 1.0 V and dark condition are presented in Figure 5e. It can be found that the carriers of CsPbIBr 2 -AG HSUL PSC have a smaller transport resistance (R trans ) and a larger recombination resistance (R rec ), which well consolidates the enhanced transport and suppressed recombination of charge carrier therein, [53,57] similar to the previous conclusion from the M-S results. [58] In addition, to study the hydrophobicity of the PSCs fabricated without and with the use of AG HSUL to the water, the contact angle measurements of water were also done (Figure 6a,b).…”

Section: Resultssupporting

confidence: 85%

“…CsPbIBr 2 PSC assembled with the use of AG HSUL yielded higher IPCEs across the entire response range, showing the better photoelectric conversion capability. [53] Furthermore, the J-V characteristic depended on light intensity is utilized to clarify the charge recombination mechanism. Figure 4e exhibits the J SC plots depended on the light intensity, the calculated slope (α) values of the planar PSCs fabricated without and with 0.2 mg mL −1 AG HSUL are 0.987 and 0.999, respectively, which approach to 1, showing a nice photoresponse and much-restrained recombination of bimolecular in the devices.…”

Section: Resultsmentioning

confidence: 99%

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Multifunctional Molecule Modification toward Efficient Carbon‐Based All‐Inorganic CsPbIBr₂ Perovskite Solar Cells

Wang

Zhang

et al. 2022

Advanced Sustainable Systems

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Favorable stability is a big challenge for the commercialization of perovskite solar cells, and all‐inorganic perovskite semiconductors have attracted much attention due to their excellent performance in this field. In reality, the poor stability is mainly due to the high‐density defects in the perovskite films, which provide a channel for charge nonradiative recombination and ion migration. In this work, a multifunctional aminoguanidine hemisulfate (AG HSUL) is introduced into the CsPbIBr2 perovskite layer to achieve defect passivation. Guanidine cations (GA+) can form strong hydrogen bonds with under‐coordinated halogen ions to stabilize the crystal lattice; the nitrogen atom in the amino group can form a complex with the under‐coordinated lead ion; inorganic acids and ions can not only compensate for halogen anion vacancies, but also combine with lead clusters or capped lead ions to reduce defect density. The synergistic effect of anions and cations can effectively passivate the defects, and an energy conversion efficiency of 10.10% is obtained at the optimal concentration of modification. In addition, carbon electrodes are used instead of metal electrodes, which greatly reduces the cost. The results provide a new idea for the development of efficient all‐inorganic CsPbIBr2 perovskite solar cells.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Multifunctional Molecule Modification toward Efficient Carbon‐Based All‐Inorganic CsPbIBr₂ Perovskite Solar Cells

Wang

Zhang

et al. 2022

Advanced Sustainable Systems

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“…where I (A) is the discharging current, Δt (s) is the discharging time, m (g) is the loading mass of the working electrode, and the ΔV (V) is the discharging voltage window. The gravimetric specific capacitances (C M , F g -1 ), energy density (E, Wh kg -1 ) and power density (P, W kg -1 ) of the working electrode for the symmetric supercapacitor could be calculated by Equations (2)(3)(4), respectively…”

Section: Methodsmentioning

confidence: 99%

“…With the environmental degradation caused by the massive consumption of fossil fuels, it is urgent to find a new electric energy storage (EES) system to replace the traditional fossil fuels. [ 1 ] Among various EES system (lithium/sodium‐ion batteries, [ 2 ] fuel cells, [ 3 ] solar cells, [ 4 ] and supercapacitors (SCs), [ 5 ] etc. ), SCs, as a compelling green energy device, have attracted considerable attention due to their long cycle life, low cost, fast charge/discharge efficiency, and high power density.…”

Section: Introductionmentioning

confidence: 99%

“…With the environmental degradation caused by the massive consumption of fossil fuels, it is urgent to find a new electric energy storage (EES) system to replace the traditional fossil fuels. [1] Among various EES system (lithium/sodium-ion batteries, [2] fuel cells, [3] solar cells, [4] and supercapacitors (SCs), [5] improve the total specific capacitance of SCs. [21] In recent years, the heteroatom-doped carbon spheres as electrode materials of SCs have attracted extensive attention.…”

Section: Introductionmentioning

confidence: 99%

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Highly Graphitized Porous Carbon Microspheres Derived from Copolymer of Glucose and Melamine for Advanced Electrodes

Lin

Song

et al. 2022

Part & Part Syst Charact

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etc.), SCs, as a compelling green energy device, have attracted considerable attention due to their long cycle life, low cost, fast charge/discharge efficiency, and high power density. [6] SCs can be divided into electrical double layer capacitors (EDLCs) and pseudocapacitance capacitors based on different charges storage mechanisms. [7] EDLCs are based on electrostatic adsorption of electrolyte ions at the double layer interface formed between electrolyte and electrode to store charge, [8] whereas the pseudocapacitance capacitors store energy through Faradaic redox reactions of metal compounds (e.g., MnO 2 , MoS 2 , Ni(OH) 2 , etc.), [9] conducting polymers (polypyrrole, polyaniline, and polythiophene), or heteroatoms (N, O, B, S, etc.). [10] However, SCs have been criticized for its low energy density at larger power density and poor capacitance under high current density in practical applications, which limit further applications. [11] Therefore, it is important to explore new functional electrode materials with ideal performances for nextgeneration EES. [12] As key components of SCs, the electrode active materials determine the total electrochemical performance for SCs. [13] Carbon materials, including activated carbons, carbon nanotubes, graphene, and carbon spheres, are considered to be ideal electrode materials due to their environmental friendliness, low cost, availability, and open porous structure. [14] As an ideal EDLCs electrode materials, [15] the hierarchical microand mesopores carbon spheres possess the following advantages: i) The three dimensional (3D) spheres architecture has larger specific surface area (S BET ) and higher electrical conductivity. [16] ii) The well-dispersed porous carbon spheres facilitated electrolyte infiltration and accelerated ions transport in the electrolyte. [17] iii) The outstanding structure stability ensures that the electrode material will not be structurally damaged at high current density. [18] Although pure carbon materials could obtain favorable performance stability and structural durability in electrochemical work, it cannot satisfy the further improvement of capacitance. [19] Therefore, the doping of heteroatoms in the carbonaceous materials introduces pseudocapacitance besides EDLCs, [20] which can further effectively The N/O co-doped hierarchical porous graphitized carbon microspheres (N/O-PCs) are successfully prepared by condensation polymerization of 5-hydroxymethylfurfural and melamine, and subsequent KOH activation strategy. The obtained carbon materials have a high specific surface area (1685.58 m 2 g -1 ), rich micro-and mesopores, and appropriate pore volume (0.828 cm 3 g -1 ). The degree of graphitization for N/O-PCs is improved because the ratio of I G and I D increases from 0.88 to 1.03. The layer spacing of the lattice plane (002) for the N/O-PCs is enlarged, facilitating the transmission of electrolyte ions. The high graphitization degree and enlarged layer spacing bring excellent electrical conductivity and wettability for N/O-PCs as...

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A Thermal‐Pressed Strategy for Crystal Growth and Boundaries Self‐Fusion of Mixed‐Halide Perovskite Films against Halide Phase Segregation

Zhang

Zhu

et al. 2022

Adv Materials Inter

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All‐inorganic mixed‐halide perovskite CsPbI3−xBrx materials have attracted extensive attention in optoelectronics due to upgraded stability and tuned bandgap. Unfortunately, undesired halide phase segregation by ion migration under illumination deteriorates photoelectrical performance and long‐term stability of devices. The severity of phase segregation is prone to occur at grain boundaries and relies on surface/interface defects. Herein, a thermal‐pressed (TP) crystal‐growth strategy is proposed to realize sufficient grain growth and boundary fusion simultaneously in a series of CsPbI3−xBrx films. The large‐sized crystals (20–40 µm), self‐fused boundaries, and single‐crystal‐like surface effectively block photoinduced ion migration. The TP‐based CsPbI3−xBrx films maintain excellent long‐life photostability over one year and exhibit markedly suppressed halide phase segregation under continuous laser illumination. Consequently, the TP‐based photodetector devices exhibit superior long‐term stability under laser illumination with different wavelengths.

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PbS/CdS heterojunction thin layer affords high-performance carbon-based all-inorganic solar cells

Cited by 64 publications

References 63 publications

Multifunctional Molecule Modification toward Efficient Carbon‐Based All‐Inorganic CsPbIBr₂ Perovskite Solar Cells

Multifunctional Molecule Modification toward Efficient Carbon‐Based All‐Inorganic CsPbIBr₂ Perovskite Solar Cells

Highly Graphitized Porous Carbon Microspheres Derived from Copolymer of Glucose and Melamine for Advanced Electrodes

A Thermal‐Pressed Strategy for Crystal Growth and Boundaries Self‐Fusion of Mixed‐Halide Perovskite Films against Halide Phase Segregation

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PbS/CdS heterojunction thin layer affords high-performance carbon-based all-inorganic solar cells

Cited by 64 publications

References 63 publications

Multifunctional Molecule Modification toward Efficient Carbon‐Based All‐Inorganic CsPbIBr2 Perovskite Solar Cells

Multifunctional Molecule Modification toward Efficient Carbon‐Based All‐Inorganic CsPbIBr2 Perovskite Solar Cells

Highly Graphitized Porous Carbon Microspheres Derived from Copolymer of Glucose and Melamine for Advanced Electrodes

A Thermal‐Pressed Strategy for Crystal Growth and Boundaries Self‐Fusion of Mixed‐Halide Perovskite Films against Halide Phase Segregation

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Product

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Multifunctional Molecule Modification toward Efficient Carbon‐Based All‐Inorganic CsPbIBr₂ Perovskite Solar Cells

Multifunctional Molecule Modification toward Efficient Carbon‐Based All‐Inorganic CsPbIBr₂ Perovskite Solar Cells