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Investigation of sol-gel and nanoparticle-based NiOx hole transporting layer for high-performance planar perovskite solar cells
摘要： We conduct a comprehensive study on and comparison of sol-gel and nanoparticles (NPs)-based nickel oxide hole-transporting layer (HTL) for high-performance planar perovskite solar cells (PSCs). The characteristics and film properties of sol-gel and NPs were systemically investigated using ultraviolet photoelectron spectroscopy (UPS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and photoluminescence (PL), and its effect on device-performance was also examined using J-V characteristics, quantum-efficiency, and the VOC dependence of the light intensity. Through this comparison of two types of HTL and their device-performances, these studies can provide sufficient and robust information for nickel oxide-based PSCs, and furthermore, the overall results and discussions can be useful for high-performance PSCs.
关键词： Nickel oxide,Planar perovskite solar cells,Hole transporting layer,Sol-gel,Nanoparticles
更新于2025-11-19 16:46:39
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Determination of the Thin-Film Structure of Zwitterion-Doped Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate): A Neutron Reflectivity Study
摘要： Doping poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is known to improve its conductivity, however little is known about the thin film structure of PEDOT:PSS when doped with an asymmetrically charged dopant. In this study, PEDOT:PSS was doped with different concentrations of the zwitterion 3-(N,N Dimethylmyristylammonio)propanesulfonate (DYMAP), and its effect on the bulk structure of the films characterized by neutron reflectivity. The results show that at low doping concentration, the film separates into a quasi bi-layer structure with lower roughness (10%), increased thickness (18%), and lower electrical conductivity compared to the un-doped sample. However when the doping concentration increases the film forms into a homogeneous layer and experiences an enhanced conductivity by more than an order of magnitude, a 20% smoother surface, and a 60% thickness increase relative to the pristine sample. Atomic force microscopy and profilometry measurements confirmed these findings, and AFM height and phase images showed the gradually increasing presence of DYMAP on the film surface as a function of the concentration. Neutron reflectivity also showed that the quasi bi-layer structure of the lowest concentration doped PEDOT:PSS is separated by a graded rather than a well defined interface. Our findings provide an understanding of the layer structure modification for doped PEDOT:PSS films that should be prove important for device applications.
关键词： neutron reflectivity,hole transporting layer,conductivity,film structure,zwitterion,PEDOT:PSS
更新于2025-11-14 15:19:41
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A Dopanta??Free Hole Transporting Layer for Efficient and Stable Planar Perovskite Solar Cells
摘要： Hybrid organic-inorganic perovskites are attractive materials for the fabrication of efficient thin film solar cells. In order to make perovskite solar cells (PSCs) suitable for commercialization, stability issue should be addressed properly. In this work, we introduce a new dopant-free organic material, PV2000, as a stable hole transporting layer (HTL) for the fabrication of stable and efficient PSCs. For this purpose, we fabricate planar PSCs using a triple-A cation perovskite composition and replace commonly used 2,2′,7,7′ -Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (spiro-OMeTAD) HTL by dopant-free PV2000 polymer. Our characterization results disclose that the PV2000 has a great thermal stability, good hole mobility and suitable band alignment that well-matched with the valence band of triple-A cation perovskite. After proper optimization of PV2000 film thickness, we achieve a planar PSC with a maximum power conversion efficiency (PCE) of 18.93%, which is comparable with the spiro-based device (19.62%). Moreover, we further improve the PCE of the PV2000 based device up to 20.5% using a band alignment engineering by deposition thin layer of polyvinylpyrrolidone (PVP) at perovskite/HTL interface. More importantly, we find that the thermal, moisture and operational stabilities of the PSCs with PV2000 HTL are improved drastically as compared to the spiro-based devices, where the PSC with PV2000 retains ~88% of its initial PCE value under continuous illumination for 250 h as compared to the spiro-based one (39%).
关键词： efficiency,PV2000,stability,Perovskite solar cell,Hole transporting layer
更新于2025-09-23 15:21:01
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The Effect of Lithium‐Doping in Solution‐Processed Nickel Oxide Films for Perovskite Solar Cells
摘要： The effect of substitutional Li doping into NiOx hole transporting layer (HTL) for use in inverted perovskite solar cells was systematically studied. Li doped NiOx thin films with preferential crystal growth along the (111) plane were deposited using a simple solution-based process. Mott-Schottky analysis showed that hole carrier concentration (NA) is doubled by Li doping. Utilizing 4% Li in NiOx improved the power conversion efficiency (PCE) of solar devices from 9.0% to 12.6%. Photoluminescence quenching investigations demonstrate better hole capturing properties of Li:NiOx compared to that of NiOx, leading to higher current densities by Li doping. The electrical conductivity of NiOx is improved by Li doping. Further improvements of the device were made by using an additional ZnO layer onto PCBM, to remove shunt paths, leading to a PCE of 14.2% and a fill factor of 0.72.
关键词： nickel oxide,lithium doping,hole transporting layer,inverted perovskite solar cells
更新于2025-09-19 17:13:59
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Cu2ZnSnS4 as an efficient hole transporting material for low temperature paintable carbon electrode based perovskite solar cells
摘要： Introducing a solution processed hole transporting layer into the low temperature paintable carbon electrode based perovskite solar cells is highly desirable to further enhance their power conversion efficiencies. At the same time, this low cost method is compatible with roll-to-roll mass production. Here, we have demonstrated that Cu2ZnSnS4 (CZTS) nanoparticles can be a potential hole transporting layer for low temperature paintable carbon electrode based perovskite solar cells. Under optimized conditions, perovskite solar cells with a CZTS hole transporting layer exhibit an average power conversion efficiency of 12.53%, which is enhanced by ~50% compared with perovskite solar cell without a CZTS hole transporting layer. At the same time, perovskite solar cells with CZTS hole transporting layer demonstrate negligible hysteresis and excellent long time stability.
关键词： Inorganic hole transporting layer,Carbon electrode,Cu2ZnSnS4,Solution process,Perovskite solar cell
更新于2025-09-16 10:30:52
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Novel NiO Nanoforest Architecture for Efficient Inverted Mesoporous Perovskite Solar Cells
摘要： Inverted perovskite solar cells (PSCs) demonstrates attractive features in developing air-stable photovoltaic device, by employing inorganic hole transport layers (HTLs). However, their power conversion efficiencies (PCEs) are still inferior to that of mesoporous n-i-p devices, mainly attributed to the undesirable hole extraction and interfacial recombination loss. Here, we design a novel one-dimensional NiO nanotubes (NTs) nanoforest as efficient mesoporous HTLs. Such NiO NTs mesoporous structure provides the highly conductive pathway for rapid hole extraction, and depresses interfacial recombination loss. Furthermore, excellent light capturing could be achieved by optimizing length and branch growth of NiO NTs nanoforest, which mimics the evolution of natural forest. Therefore, this inverted mesoporous PSCs yields an optimal efficiency of 18.77%, which is still prominent in state-of-the-art NiO-based devices. Alternatively, the mesoporous device exhibits greatly improved long-term stability. This work provides a new design perspective for developing high-performance inverted PSCs.
关键词： mesoporous structure,NiO,hole transporting layer,Inverted perovskite solar cells,nanotube nanoforest
更新于2025-09-12 10:27:22
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Electrical property modified hole transport layer (PEDOT:PSS) enhance the efficiency of perovskite solar cells: hybrid co-solvent post-treatment
摘要： Poly(3,4-ethylenedioxythiphene):poly(styrenesulfonate) (PEDOT:PSS) layer as a hole transport layer (HTL) plays a key role in efficient hole extraction and transportation of the inverted planar perovskite solar cells (PSCs). However, the insulating nature of PSS lead to lower electrical property of the PEDOT:PSS film, which impedes transferring hole and results in a low photocurrent of the PSCs. In this work, dimethylformamide (DMF), methanol and their mixture solvents (co-solvent) were employed to treat the PEOT:PSS thin film after deposition with different methods to enhance the film’s electrical conductivity. Electrical conductivity of the PEDOT:PSS films was increased from 10-3 S.cm-1 to ~102 S.cm-1 after the co-solvents treatment. Using the highest conductivity co-solvent treated PEDOT:PSS thin film as the HTL in a perovskite solar cell, the power conversion efficiency (PCE) of the device has been measured improved by 17.5% as compared with that of the control device with the untreated PEDOT:PSS film as the HTL. This result shows that the hybrid co-solvent post-treatment is a simple and feasible way to modified the electrical properties of the PEDOT:PSS film as the HTL for high efficient PSCs and other thin film electronic and optoelectronic devices.
关键词： Perovskite solar cells,PEDOT:PSS,Hole transporting layer,Solvent treatment,Conductivity
更新于2025-09-12 10:27:22
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Cupric oxide film with a record hole mobility of 48.44?cm2/Vs via direct–current reactive magnetron sputtering for perovskite solar cell application
摘要： Cupric iodide and cuprous oxide as hole–transporting layer (HTL) materials in perovskite solar cells (PSCs) have been reported. However, the compositional instability and poor electrical conductivity of ?lms in ambient air have limited their applications in PSCs. Cupric oxide (CuO) ?lms may be used as a HTL material in PSCs due to their high electrical conductivity and high stability in ambient air even if their hole mobility is still required to further increase. Herein, single-phase monoclinic CuO ?lms with p–type conduction were room-temperature prepared via direct–current reactive magnetron sputtering, thereby garnering low–cost advantage. CuO ?lm prepared at 1:3 O2/Ar ?ow ratio (Ro/a) was best crystallized and preferred ??1 1 1? oriented, thereby resulting in a record mobility of 48.44 cm2/Vs and small electrical resistivity of 0.50 Ω?cm. The PSCs with CuO as HTL material obtained 1.3% power conversion e?ciency, indicating that CuO ?lms with record hole mobility could be used as a HTL material in PSCs.
关键词： Hole–transporting layer,Cupric oxide,Perovskite solar cells,Magnetron sputtering,Optical properties,Electrical properties
更新于2025-09-12 10:27:22
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P‐9.6: Highly Luminescent Blue Quantum Dots Light‐Emitting Diodes
摘要： A better charge balance is realized for blue quantum dot light-emitting diodes (QLEDs) through doping the charge transport layer (CTL) to improve hole injection and suppress redundant electrons. High performance blue QLEDs were achieved by fine-tuning the charge balance within the emitting layer.
关键词： electron-transporting layer,quantum dots light-emitting diodes,charge balance,hole-transporting layer,hybrid charge transporting layer
更新于2025-09-11 14:15:04
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Enhanced photovoltaic performance of solution-processed Sb2Se3 thin film solar cells by optimizing device structure
摘要： Thin-film solar cells have attracted worldwide attention due to their high efficiency and low cost. Antimony selenide (Sb2Se3) is a promising light absorption material candidate for thin-film solar cells due to its suitable band gap, abundance, low toxicity, and high chemical stability. Herein, we fabricate an Sb2Se3 thin film solar cell using a simple hydrazine solution process. By controlling the thickness of the photoactive layer and inserting a poly(3-hexylthiophene) hole-transporting layer, an Sb2Se3 solar cell with a power conversion efficiency of 2.45% was achieved.
关键词： hole-transporting layer,n-i-p structure,solution process,poly(3-hexylthiophene),antimony Selenide,thin film solar cell
更新于2025-09-11 14:15:04