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CuSCN as the Back Contact for Efficient ZMO/CdTe Solar Cells
摘要： The replacement of traditional CdS with zinc magnesium oxide (ZMO) has been demonstrated as being helpful to boost power conversion e?ciency of cadmium telluride (CdTe) solar cells to over 18%, due to the reduced interface recombination and parasitic light absorption by the bu?er layer. However, due to the atmosphere sensitivity of ZMO ?lm, the post treatments of ZMO/CdTe stacks, including CdCl2 treatment, back contact deposition, etc., which are critical for high-performance CdTe solar cells became crucial challenges. To realize the full potential of the ZMO bu?er layer, plenty of investigations need to be accomplished. Here, copper thiocyanate (CuSCN) is demonstrated to be a suitable back-contact material with multi-advantages for ZMO/CdTe solar cells. Particularly, ammonium hydroxide as the solvent for CuSCN deposition shows no detrimental impact on the ZMO layer during the post heat treatment. The post annealing temperature as well as the thickness of CuSCN ?lms are investigated. Finally, a champion power conversion e?ciency of 16.7% is achieved with an open-circuit voltage of 0.857 V, a short-circuit current density of 26.2 mA/cm2, and a ?ll factor of 74.0%.
关键词： zinc magnesium oxide,copper thiocyanate,CdTe,CuSCN
更新于2025-09-23 15:21:01
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Application of Solution-Processed CuSCN and AgSCN for High Efficient CdTe Solar Cells
摘要： Solution processed CuSCN and AgSCN were employed as Cu and Ag doping source in the CdTe solar cell. The effect of Cu and Ag on the CdTe device performance was investigated. It is promising to show that the CuSCN and AgSCN with similarity role to increase devices performance to power conversion efficiency to 17% and 16%, respectively. The benefit from CuSCN is that the dual role of CuSCN, one is the hole transport layer and one is Cu doping, while AgSCN with a higher resistive may play as Ag doping source with slower diffusion rate.
关键词： Solution Process,CdTe thin film solar cells,CuSCN,AgSCN
更新于2025-09-23 15:21:01
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Polymer/Inorganic Hole Transport Layer for Low-Temperature-Processed Perovskite Solar Cells
摘要： In the search for improvements in perovskite solar cells (PSCs), several different aspects are currently being addressed, including an increase in the stability and a reduction in the hysteresis. Both are mainly achieved by improving the cell structure, employing new materials or novel cell arrangements. We introduce a hysteresis-free low-temperature planar PSC, composed of a poly(3-hexylthiophene) (P3HT)/CuSCN bilayer as a hole transport layer (HTL) and a mixed cation perovskite absorber. Proper adjustment of the precursor concentration and thickness of the HTL led to a homogeneous and dense HTL on the perovskite layer. This strategy not only eliminated the hysteresis of the photocurrent, but also permitted power conversion efficiencies exceeding 15.3%. The P3HT/CuSCN bilayer strategy markedly improved the life span and stability of the non-encapsulated PSCs under atmospheric conditions and accelerated thermal stress. The device retained more than 80% of its initial efficiency after 100 h (60% after 500 h) of continuous thermal stress under ambient conditions. The performance and durability of the PSCs employing a polymer/inorganic bilayer as the HTL are improved mainly due to restraining perovskite ions, metals, and halides migration, emphasizing the pivotal role that can be played by the interface in the perovskite-additive hole transport materials (HTM) stack.
关键词： interface,CuSCN,poly(3-hexylthiophene),stability,bilayer
更新于2025-09-23 15:19:57
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Understanding Molecular Adsorption on CuSCN Surfaces Toward Perovskite Solar Cell Applications
摘要： CuSCN has been employed as the hole transporting material for solar cells and it is established to offer superior power conversion efficiencies and stabilities of the perovskite solar cell. In this manuscript, we carry out first principles calculations to understand the structures and properties CuSCN surfaces in the presence of small molecules that are common in the solution processable solar cells. The molecular adsorbates include additives, precursors and solvents to synthesize the halide perovskite solar cell components such as methylammonium iodide (MAI), lead iodide (PbI2), acetonitrile, chloroform, dimethylformamide (DMF), dimethylsulfoxide (DMSO), methanol and ethanol. The study suggests that the CuSCN surfaces interact with these additive molecules in various degrees and such adsorption is strongly dependent on the CuSCN surface directions. The presence of the PbI2 moiety leads to additional empty states inside the band gap of CuSCN. The presence of the molecular adsorbates impacts on the electronic and optical properties of the CuSCN surfaces, and further additive-based interfacial engineering approach of the perovskite/CuSCN system is called for. This study paves the way toward the fundamental understanding of the CuSCN surfaces toward optoelectronic applications.
关键词： perovskite solar cells,optoelectronic applications,CuSCN,molecular adsorption,first principles calculations
更新于2025-09-19 17:13:59
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Aminosilane‐Modified CuGaO <sub/>2</sub> Nanoparticles Incorporated with CuSCN as a Hole‐Transport Layer for Efficient and Stable Perovskite Solar Cells
摘要： Herein, solution-processible inorganic hole-transport layer (HTL) of a perovskite solar cell that consists of CuGaO2 nanoparticles and CuSCN, which leads to an improved device performance as well as long-term stability, is reported. Uniform films of CuGaO2 are prepared by first treating CuGaO2 nanoparticles with aminosilane that leads to well-dispersed CuGaO2 solution, followed by spin-coating of the suspension. Subsequent spin-coating of CuSCN solution onto the CuGaO2 forms a smooth HTL with excellent coverage and electrical conductivity. Comparing to the reference device with CuSCN HTL, the CuGaO2/CuSCN device improves carrier extraction and reduces trap density by ≈40%, as measured by photoluminescence and capacitance analysis. Excellent thermal stability is also demonstrated: ≈80% of the initial efficiency of the perovskite solar cells with the CuGaO2/CuSCN HTL is retained after 400 h under 85 °C/85% relative humidity environment.
关键词： CuGaO2,CuSCN,perovskite solar cells,long-term stability
更新于2025-09-19 17:13:59
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Solution processed CuSCN/perylene hole extraction layer for highly efficient and stable organic solar cells
摘要： In this work, we report a solution processed hole extraction layer (HEL) for highly efficient organic solar cells (OSCs), which is formed by CuSCN and perylene. It shows that the introduction of perylene helps to polish the interface between HEL and active layers, leading to efficient charge transport and collection, diminished recombination loss, and thereby improving the photovoltaic performance. In poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b; 4,5-b]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)]:[6,6]-phenyl C71-butyric acid methyl ester (PTB7-Th:PC71BM) based OSCs, over 9% enhancement of power conversion efficiency (PCE) is obtained in the cells using bilayer CuSCN/perylene as HEL compared with that of the reference cell using pure CuSCN as HEL. The advantage of bilayer CuSCN/perylene HEL is also confirmed in nonfullerene system. An improved PCE is also obtained after application of perylene in nonfullerene system based cell. Furthermore, superior air stability has been observed in CuSCN and CuSCN/perylene HEL based cells. The use of a bilayer CuSCN/perylene HEL proves a potential approach to obtain efficient and stable OSCs.
关键词： Hole extraction layer,Photovoltaic performance,CuSCN,Perylene,Organic solar cells
更新于2025-09-16 10:30:52
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AIP Conference Proceedings [AIP Publishing RENEWABLE ENERGY SOURCES AND TECHNOLOGIES - Tamil Nadu, India (14–15 March 2019)] RENEWABLE ENERGY SOURCES AND TECHNOLOGIES - Preparation of p-type CuSCN thin film by electrochemical method for inverted planar perovskite solar cells
摘要： Here, we report the electrochemical deposition (ECD) of CuSCN thin film from aqueous solution at room temperature. Typically, a compact layer of CuSCN is deposited onto the indium doped tin oxide (ITO) coated substrate. The synthesized CuSCN thin film was successfully used as a Hole Transport Marterial (HTM) in perovskite solar cells and the preliminary result reveals that the synthesized CuSCN is a promising hole transporting material for inverted planar perovskite solar cells. The structural, optical and morphological investigations of the synthesized CuSCN were carried out by X-ray diffraction (XRD), UV-Vis spectroscopy (UV), scanning electron microscopy (SEM) and I-V curve respectively.
关键词： hole transport material,electrochemical deposition,CuSCN,perovskite solar cells
更新于2025-09-16 10:30:52
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CuSCN as Hole Transport Material with 3D/2D Perovskite Solar Cells
摘要： We report stable perovskite solar cells having 3D/2D perovskite absorber layers and CuSCN as an inorganic hole transporting material (HTM). Phenylethylammonium (PEA) and 4-fluoro-phenylethylammonium (FPEA) have been chosen as 2D cations, creating thin layers of (PEA)2PbI4 or (FPEA)2PbI4 on top of the 3D perovskite. The 2D perovskite as an interfacial layer, neutralizes defects at the surface of the 3D perovskite absorber and can protect from moisture-induced degradations. We demonstrate excellent charge extraction through the modified interfaces into the inorganic CuSCN HTM, with device efficiencies of above 18%, compared to 19.3% with conventional spiro-OMeTAD. Furthermore, we show significantly enhanced ambient stability.
关键词： Phenylethylammonium (PEA),CuSCN,hole transporting material (HTM),power conversion efficiencies (PCE),4-fluoro-phenylethylammonium (FPEA),perovskite based solar cells (PSCs)
更新于2025-09-12 10:27:22
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Graphene interfacial diffusion barrier between CuSCN and Au layers for stable perovskite solar cells
摘要： Perovskite solar cells (PSCs) have rapidly achieved a remarkable power conversion efficiency (PCE). However, the inherent instability of components has impeded industrialization. Here we employed atomically-thin impermeable graphene (3 layers) as an interfacial barrier for moisture, I? ion, and Au diffusion. A new graphene transfer method was developed, and the position was carefully optimized between the CuSCN and Au electrode in a full cell considering the band alignment of cell components. There was a negligible change in maximum PCE (15.2-15.8%) with the incorporation of graphene due to the high hole mobility of graphene. The moisture intrusion was significantly reduced under 85% relative humidity (RH) for 3 weeks, suppressing PbI2 formation. The graphene barrier maintained >94% of initial PCE under 50% RH for 30 days. It mostly inhibited I? ion migration and perfectly blocked Au diffusion between the perovskite and Au electrode, allowing reversible recovery of electrical power during 3 continuous illumination/dark cycles (12 h each) with a positive bias. A further improvement in the graphene transfer method may enable a perfect single-layer graphene barrier, without compromising the average PCE of multiple devices.
关键词： CuSCN,Graphene,Diffusion barrier,Au layers,Stability,Perovskite solar cells
更新于2025-09-12 10:27:22
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Electrodeposition of porous CuSCN layers as hole-conducting material for perovskite solar cells
摘要： One of the most promising among hole-conducting materials, CuSCN, was prepared for the first time in a form of porous layers for potential applications in inverted perovskite solar cells.
关键词： porous CuSCN,perovskite solar cells,electrodeposition,hole-conducting material
更新于2025-09-12 10:27:22