- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
A Selfa??Assembled Small Moleculea??Based Hole Transporting Material for Inverted Perovskite Solar Cells
摘要： Hybrid organic-inorganic perovskite solar cells have recently emerged as one of the most promising low-cost photovoltaic technologies. The remarkable progress of perovskite photovoltaics is closely related to interfacial engineering and development of charge selective interlayers. Herein we present the synthesis and characterization of a fused azapolyheteroaromatic small molecule, namely anthradi-7-azaindole (ADAI), with outstanding performance as hole transporting layer in perovskite solar cells with inverted architecture. Its molecular arrangement, induced by hydrogen bond-directed self-assembly, favors a suitable morphology of layer, reducing recombination as revealed by light intensity dependence, photoluminescence and electroluminescence studies.
关键词： inverted perovskite solar cell,self-assembled conjugated molecule,undoped hole transport layer
更新于2025-09-16 10:30:52
-
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
-
Fluorinated fulleropyrrolidine as universal electron transport material for organic-inorganic and all-inorganic perovskite solar cells
摘要： [6,6]-Phenyl-C61-butyric acid methylester (PC61BM) has been widely used as electron transport material (ETM) for both organic-inorganic hybrid and all inorganic perovskite solar cells (PeSCs) with inverted structure. However, PC61BM still remains to be improved due to its low electrical conductivity and inferior passivation effect towards perovskite. In this work, we synthesize two perfluorophenyl-substituted fulleropyrrolidines, 2-(perfluorophenyl)-5-phenyl-C60-fulleropyrrolidine (FP-i) and 2,5-bis-(perfluorophenyl)-C60-fulleropyrrolidine (FP-ii) via a modified 1,3-dipolar cycloaddition reaction. FP-i and FP-ii are introduced into inverted PeSCs based on organic-inorganic hybrid and all inorganic perovskites (CH3NH3PbCl3-xIx and CsPbI2Br) as ETMs. The PeSCs based on FP-i and FP-ii display good photovoltaic performance and device stability, which are superior or comparable to those with PC61BM. The mechanism studies reveal that FP-i and FP-ii possess higher electrical conductivity, more significant passivation capacity and enhanced hydrophobicity but slightly lower low unoccupied molecular orbital (LUMO) levels. These results suggest that FP-i and FP-ii are universal ETMs for both organic-inorganic hybrid and all inorganic PeSCs, which are better or comparable to conventional ETM of PC61BM.
关键词： Inverted perovskite solar cell,Fullerene derivative,Passivation effect,Device stability,Electron transporting layer
更新于2025-09-16 10:30:52
-
Dicyanovinylene and Thiazolo[5,4-d]thiazole-Core Containing D-A-D Type Hole Transporting Materials for Spiro-OMeTAD Free Perovskite Solar Cell Applications with Superior Atmospheric Stability
摘要： In perovskite solar cell (PSC) devices, hole transporting materials (HTMs) are vital components affecting the charge separation and play an important role in achieving high efficiencies. These may also protect active light-absorbing layers from degradation. The current best-in-class HTM Spiro-OMeTAD is prohibitively expensive for large scale application and hence design of novel cost-effective HTMs yielding comparable device performance is essential. In this manuscript, we report synthesis of donor-acceptor-donor (D-A-D) type hole transporting materials (TTz-1 and TPDCN) featuring the dicyanovinylene and thiazolo[5,4-d]thiazole cores and evaluate their performance via integrating them in perovskite solar cells (PSCs). The results suggest that both the HTMs are easy to synthesize and demonstrate favourable structural characteristics for device integration. Detailed analysis reveals that the molecules showed appropriate energy level alignment with methylammonium lead iodide (CH3NH3PbI3) perovskite, possess good thermal stability and high hole mobility. Planar PSC devices fabricated using TTz-1 as HTM yielded a power conversion efficiency (PCE) of 11.37%, whilst devices using TPDCN shows a PCE of 10.11%, comparable to PCE of 11.62% obtained in control samples based on Spiro-OMeTAD. In additional, stability analysis of the devices shows that devices fabricated using TTz-1 and TPDCN exhibit superior atmospheric stability as compared to those based on Spiro-OMeTAD. These results suggest that the reported HTM architectures are promising leads for designing new HTMs for perovskite solar cells owing to their simple and scalable synthesis and tunability.
关键词： Thiazolo[5,4-d]thiazole,Hole transporting materials,Dicyanovinylene,Perovskite solar cell,Donor-Acceptor-Donor
更新于2025-09-16 10:30:52
-
Effective Carbon Composite Electrode for Lowa??Cost Perovskite Solar Cell with Inorganic CuIn <sub/>0.75</sub> Ga <sub/>0.25</sub> S <sub/>2</sub> HTM
摘要： The perovskite solar cells are well-known as being low cost, solution-based and efficient solar cells, however, the high price of the conventional hole-collector electrode (Spiro-OMeTAD/Gold), the high price and complexity of depositing gold in large scale are major barriers against commercializing them. An effective carbon composite electrode is introduced for a low-cost perovskite solar cell with CuIn0.75Ga0.25S2 hole transport material in this research to solve this problem. The carbon electrode is deposited by the doctor blade method using a paste composed of flakes of graphite, carbon black and a kind of hydrophobic polymer (polystyrene or poly-methyl methacrylate). It is investigated how the weight ratio of carbon black to graphite and type of binder affect sheet resistance and resistivity of carbon composite layer. The effects of carbon electrode composition on the charge transport resistance at the CuIn0.75Ga0.25S2/perovskite interface are investigated using impedance spectroscopy in different light intensities of white light and light with different wavelengths of 530 nm, 660 nm, and 740 nm. The best efficiency of 15.9% is obtained for the champion cell (fabricated outside the glovebox) which is close to the best efficiency of the reference cell with conventional Spiro-OMeTAD/Gold hole-collector that is 16.3%.
关键词： Copper indium gallium sulfide,Hole transport material,Carbon electrode,Perovskite solar cell,Charge transfer resistance
更新于2025-09-16 10:30:52
-
Bifacial, Color-Tunable Semitransparent Perovskite Solar Cells for Building-Integrated Photovoltaics
摘要： Recently, semitransparent perovskite solar cells (ST-PSCs) have received overwhelming attention due to their potential applications in building integrated photovoltaics (BIPV) and in tandem solar cells. The best ST-PSCs, despite the high efficiency achieved, still show limited bifacial properties and lack aesthetic properties. Here, we have demonstrated efficient bifacial colorful ST-PSCs using copper thiocyanate (CuSCN), as hole transporting material, in a n-i-p architecture. The n-i-p ST-PSCs exhibit the highest reported bifacial factor of 93.7% and achieved a bifacial equivalent efficiency of 22.1% when illuminated under 1-sun standard conditions on the front side and with a reflected albedo of ~ 54.4% from the back side. We have also demonstrated that the colorful appearance of CuSCN based ST-PSCs can be easily tuned across the entire visible spectrum by tuning the ITO (or CuSCN) thickness without affecting their final efficiency. The wide colorful tunability and excellent bifacial photovoltaic behavior of CuSCN based ST-PSCs make them a promising candidate for BIPV applications.
关键词： colorful perovskite solar cell,semi-transparent perovskite solar cell,perovskite,BIPV,bifacial solar cell
更新于2025-09-12 10:27:22
-
Expanding the Light-Harvesting of CsPbI2Br to Near-Infrared by Integrating with Organic Bulk-Heterojunction for Efficient and Stable Solar Cells
摘要： All-inorganic perovskite (CsPbX3, X=Br or I) solar cells demonstrate superior stability while the power conversion efficiency (PCE) lags behind the organic-inorganic hybrid counterparts mainly due to the limitation of narrow absorption bands. To broaden its absorption spectrum and improve its PCE, all-inorganic perovskite/organic integrated solar cells utilizing CsPbI2Br as ultraviolet-visible light absorber and PBDTTT-E-T:IEICO as near-infrared light absorber are demonstrated in this work. The integrated solar cells exhibit a broadened photo-response to over 900 nm attributing to the integration of PBDTTT-E-T:IEICO. The additional absorption enhances the short-circuit current density from 14.78 mA/cm2 to 15.98 mA/cm2, resulting greatly improved PCE of 14.03% for integrated solar cells, much higher than that of the control perovskite solar cells (12.53%) and organic solar cells (7.51%). In-depth understanding of the charge transfer dynamic process in CsPbI2Br/PBDTTT-E-T:IEICO film is comprehensively analyzed by photoinduced transient absorption spectroscopy. Furthermore, the air stability and thermal stability of the integrated solar cells are greatly enhanced. For unencapsulated integrated solar cells, the PCE still preserve 95% of its initial value after aging for 300 hours in an ambient environment and the PCE retains about 90% of its original value even after aged at 85 ℃ for 180 hours in nitrogen.
关键词： light-harvesting,perovskite solar cell,stability,all-inorganic perovskite,integrated solar cell
更新于2025-09-12 10:27:22
-
Investigating the effect of polythiocyanogen on morphology and stability of the perovskite layer and its application in the hole-transport material free perovskite solar cell
摘要： Over the recent years, solid-state hybrid solar cells based on perovskite organ metal halides, i.e., CH3NH3PbX3 (X= I, Br, or Cl), have attracted considerable attention because of very rapid development and high conventional efficiency. At present, the most challenging part in perovskite solar cells is the high stability, which must be solved before putting them into the practical application. In this study, polythiocyanogen (SCN)n was used as an additive to improve the stability of the perovskite layer at the environmental condition. Polythiocyanogen have been used to replace iodide in CH3NH3PbI3, and the resulting perovskite films CH3NH3PbI3.(SCN)n are used as the active material in hole-transport material (HTM) free perovskite solar cells. Polythiocyanogen in the presence of iodine in the MAPbI3 exhibits semiconductor properties which can improve the performance of the perovskite solar cell. In this work, the CH3NH3PbI3.(SCN)n absorber layers with the various polythiocyanogen amount (0, 8, 16 and 24 mg/mL) and perovskite solar cells with the FTO/C-TiO2/Meso-TiO2/[CH3NH3PbI3.(SCN)n]/Au structure was fabricated. A one-step solution process was used for deposition of the CH3NH3PbI3.(SCN)n absorber layers. UV-Vis spectra and XRD results reveal that polythiocyanogen could protect perovskite layer from degradation. Moreover, polythiocyanogen has photovoltaic properties and CH3NH3PbI3.(SCN)n perovskite solar cell shown better short-circuit current density (Jsc) and subsequently the higher power-conversion efficiency (PCE) as well. By adding a small amount of polythiocyanogen to the conventional layer of perovskite solar cell, the short-circuit current density JSC has increased from 5.26 to 11.75 mAcm-2, and the power-conversion efficiency PCE has increased from 2.95% to 6.27%.
关键词： Perovskite layer,HTM free Perovskite solar cell,Stability,Polythiocyanogen
更新于2025-09-12 10:27:22
-
Synthesis and characterization of CH <sub/>3</sub> NH <sub/>3</sub> PbI <sub/>3</sub> and CH <sub/>3</sub> NH <sub/>3</sub> PbI <sub/>(3-x)</sub> Cl <sub/>x</sub> perovskite solar cell materials
摘要： The emerging of perovskite solar cell has attracted many interests in the synthesis and characterization of hybrid perovskite materials related to methylammonium iodide (MAI) due to various promising properties. In this work, we found a faster way to synthesize hybrid perovskite CH3NH3PbI3 and CH3NH3PbI(3-x)Clx (x ? 0,1,2) powders from a different solvent in the preparation process of MAI precursor. In addition, it was found that Cl atoms cannot directly substitute for I in CH3NH3PbI(3-x)Clx powders, as characterized by XRD and XAS, with a solid-state method employed in the perovskite (ABX3) structure.
关键词： MAI,XANES,Hybrid perovskite solar cell
更新于2025-09-12 10:27:22
-
(CH3NH3)3Bi2I9 perovskite films fabricated via a two-stage electric-field-assisted reactive deposition method for solar cells application
摘要： Methylammonium bismuth iodide ((CH3NH3)3Bi2I9, MBI) is a promising alternative to perovskite solar cells (PSCs) due to its air stability and low-toxicity. Herein, a two-stage electric-field-assisted reactive deposition method has been introduced to prepare MBI films for the first time. PSCs based on MBI films were fabricated and characterized. The influences of electric parameters (applied voltage mode, pulse and time, etc.) on the morphology and crystal structure of MBI film correlated with the photovoltaic performance of PSCs have also been investigated systematically in detail. Through adjusting the voltage mode, crystal growth can be completely controlled, leading to a compact MBI film with large grain size. Moreover, the MBI film prepared by electrochemical deposition required no annealing. This work determined that the optimal performance of PSCs is based on the MBI film deposited by square-wave (AC) voltage mode (-7.3 V/+1 V, 5 Hz, 5 min). All devices exhibited long-term stability in ambient air (humidity of >50%) for more than 300 h. This study will inspire further research on the application of electrochemical deposition technic for other lead-free PSCs.
关键词： (CH3NH3)3Bi2I9,Square-wave (AC) voltage,Electrochemical deposition,Pulse-constant voltage,Perovskite solar cell
更新于2025-09-12 10:27:22