- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Cu <sub/>12</sub> Sb <sub/>4</sub> S <sub/>13</sub> Quantum Dots with Ligand Exchange as Hole Transport Materials in All-Inorganic Perovskite CsPbI <sub/>3</sub> Quantum Dot Solar Cells
摘要： Perovskite solar cells (PSCs) have developed rapidly in the past ten years. However, they are faced with huge challenge on stability improvement because of the volatile organic component in light absorption and hole transporting layer. Herein, we fabricate all inorganic PSCs with the structure of FTO/c-TiO2/m-TiO2/CsPbI3 quantum dots (QDs)/Cu12Sb4S13 QDs/Au to improve device stability. To enhance the photovoltaic performance of PSCs, the surface oleylamine ligands of Cu12Sb4S13 QDs with 3-mercaptopropionic acid are exchanged, as the enhanced electronic coupling and reduced bandgap are realized after the ligands exchange. Cu12Sb4S13 QDs based PSCs exhibit a PCE of 10.02%, approaching to the Spiro-MeOTAD based PSCs (12.14%). A high short-circuit current density of 18.28 mA*cm-2 is achieved because of the enhanced light absorption and excellent hole extraction ability of Cu12Sb4S13 QDs. Moreover, Cu12Sb4S13 QDs based PSCs exhibit the improved long-term stability and retain 94% of their initial PCE after stored in ambient air after 360 h.
关键词： ligands exchange,hole transporting materials,photovoltaic efficiency,stability,Cu12Sb4S13 quantum dot,perovskite quantum dot solar cells
更新于2025-09-19 17:13:59
-
Tetraphenylbutadiene-Based Symmetric 3D Hole-Transporting Materials for Perovskite Solar Cells: A Trial Trade-off between Charge Mobility and Film Morphology
摘要： Two three-dimensional symmetric tetraphenylbutadiene derivatives decorated with diphenylamine or triphenylamine fragments are first prepared for use as hole-transporting materials (HTMs) in perovskite solar cells (PSCs). The HTMs are acquired using straightforward synthetic methods and facile purification techniques. The thermal stability, photophysical properties, electrochemical behaviors, computational study, hole mobility, X-ray diffraction, hole transfer dynamics, hydrophobicity, surface morphology, and photovoltaic performances of the HTMs are discussed. The highest power conversion efficiency (PCE) of CJ-04-based cell is 13.75%, which is increased to 20.06% when CJ-03 is used as HTM, superior to the PCE of the cell based on 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) (18.90%). The preparation cost of CJ-03 accounts for merely 23.1% of the price of commercial spiro-OMeTAD, while the concentration of CJ-03 solution used in the device fabrication (60.0 mg mL–1) is lower compared with that of the spiro-OMeTAD solution (72.3 mg mL–1). These results corroborate that the screw-like HTMs with a highly distorted configuration are facilely available and promising candidates for PSCs. More importantly, a practical solution is proposed to achieve moderate charge mobility and good film-formation ability of the HTMs simultaneously.
关键词： butadiene,hole-transporting materials,film morphology,charge transport,perovskite solar cells
更新于2025-09-19 17:13:59
-
Dopant‐Free Hole Transporting Molecules for Highly Efficient Perovskite Photovoltaic with Strong Interfacial Interaction
摘要： One of the attractive ways to develop efficient and cost-effective inverted perovskite solar cells (PVSCs) is through the use of dopant-free hole transporting materials (HTMs) with facile synthesis and a lower price tag. Herein, two organic small molecules with a fluorene core are presented as dopant-free HTMs in inverted PVSCs, namely, FB-OMeTPA and FT-OMeTPA. The two molecules are designed in such a way they differ by replacing one of the benzene rings (FB-OMeTPA) with thiophene (FT-OMeTPA), which leads to a significantly improved coplanarity as manifested in the redshift of the absorbance and a smaller bandgap energy. Density functional theory calculations show that FT-OMeTPA has a strong Pb2+–S interaction at the FT-OMeTPA/perovskite interface, allowing surface passivation and facilitating charge transfer across interfaces. As a result, the PVSCs based on FT-OMeTPA exhibit a much higher hole mobility, power conversion efficiency, operational stability, and less hysteresis as compared with devices based on FB-OMeTPA.
关键词： hole transporting materials,dopant-free,p-i-n,inverted perovskite photovoltaics,interfacial interactions
更新于2025-09-19 17:13:59
-
A Spirobixanthene‐Based Dendrimeric Hole‐Transporting Material for Perovskite Solar Cells
摘要： A dendrimer based on a spirobixanthene core, termed DH1, is designed and synthesized as a hole-transporting material (HTM) for perovskite solar cells (PSCs). DH1 showing a hyperbranched structure with methoxydiphenylamine carbazole dendrons stretching outward along the para-phenylene spacer acquires a large molecular size of up to 1.9 nm, which favors good thermal stability and amorphous property. The thus obtained DH1-based pinhole-free film as a hole-transport layer results in a power conversion efficiency of 17.13% and reduced hysteresis behavior of MAPbI3-based planar PSCs. This work provides the first example of the use of dendrimer-type HTM for PSC application, demonstrating a promising approach to design HTMs in a quasiglobular dendrimer with a large molecular size.
关键词： dendrimers,spirobixanthene,perovskite solar cells,hole-transporting materials
更新于2025-09-19 17:13:59
-
P3HT with Zn(C <sub/>6</sub> F <sub/>5</sub> ) <sub/>2</sub> as p‐Type Dopant for the Enhanced Performance of Planar Perovskite Solar Cells
摘要： The molecular organic Lewis acid bis(pentafluorophenyl)zinc [Zn(C6F5)2] is reported as an efficient p-type dopant for poly(3-hexylthiophene-2,5-diyl) (P3HT), to be used as hole-transporting material (HTM) in perovskite solar cells (PSCs) for the first time. To date, the most efficient PSCs use lithium bis(trifluoromethane) sulfonimide lithium salt (LiTFSI) and 4-tert-butylpyridine (tBP) as standard additives for HTMs. However, such dopants can induce deleterious effects on device stability. Herein, the effect of the concentration of Zn(C6F5)2 in P3HT HTM on the performance of PSCs is investigated. The P3HT-based PSCs using a low concentration of the dopant (0.025 mol%) in the HTM layer exhibit the best performance and the highest power conversion efficiency (PCE) of 17.49%, which is almost 3.5% higher than the achieved PCE for pristine P3HT-based PSCs. The origin of the improved performance for PSCs is further investigated, by studying the conductivity and hole mobility of the thin films based on pristine and doped P3HT. Adding a small amount of Zn(C6F5)2 to P3HT increases its thin-film hole mobility and its hole extraction ability.
关键词： Lewis acid dopants,poly(3-hexylthiophene-2,5-diyl),perovskite solar cells,hole-transporting materials
更新于2025-09-19 17:13:59
-
Triphenylamine-based hole transporting materials with thiophene-derived bridges for perovskite solar cells
摘要： A triphenylamine-based compound containing benzoyl[1,2-b:4,5-b’]dithiophene (BDT) derivative (BTPA-2) has been synthesized and employed in FA0.85MA0.15PbI3 perovskite solar cells (PSCs) as the hole transporting material (HTM). The reference BTPA-1 containing thiophene bridge was also prepared for a comparative study. Compared to the thiophene unit in BTPA-1, the hexyloxy substituted BDT unit in BTPA-2 made the HOMO energy level lower. The more conjugated system with the BDT unit can improve the conductivity and hole mobility. The BTPA-1 and BTPA-2 based FA0.85MA0.15PbI3 PSCs showed the best power conversion efficiencies (PCE) of 12.76 % and 13.97 %, respectively. Larger Voc and higher Jsc for the BTPA-2 based PSC were attributed to its reduced interfacial recombination and more conjugated system compared to the BTPA-1 based PSCs. More hydrophobic property of BTAP-2 made its PSC exhibit better environmental stability than BTPA-1.
关键词： Thiophene,Perovskite solar cells,Water contact angle,Hole transporting materials,Triphenylamine
更新于2025-09-19 17:13:59
-
Poly(3a??hexylthiophene)/Gold Nanorod Composites as Efficient Holea??Transporting Materials for Perovskite Solar Cells
摘要： Poly(3-hexylthiophene)/gold nanorod (P3HT/AuNR) composites were developed and introduced as hole-transporting materials (HTMs) to fabricate mixed-ion perovskite solar cells (PSCs). The power conversion efficiency (PCE) of the optimized devices based on the composite HTM reached up to 16.88%, which was an increase of 26% from that of a pristine P3HT-based device (13.40%). The enhanced performance can be attributed to the increased crystallinity of P3HT induced by the addition of AuNRs in the polymer matrix and the localized surface plasmon resonance (LSPR) effect of AuNRs, which lead to higher carrier mobility and increased light utilization efficiency. This work provides a comprehensive understanding of the effect of plasmonic Au nanorods in PSCs application and a useful method to further improve the performance of PSCs.
关键词： gold nanorod,hole-transporting materials,perovskite solar cells,nanocomposite,P3HT
更新于2025-09-19 17:13:59
-
Hole transport material based on modified N-annulated perylene for efficient and stable perovskite solar cells
摘要： N-annulated perylene based materials show outstanding and tunable optical and physical properties, making them suitable to be charge transport materials for optoelectronic applications. However, this type of materials has so far not been well studied in solar cells. Here, we develop a new hole transport material (HTM), namely S5, based on perylene building block terms, for organic-inorganic hybrid perovskite solar cells (PSCs). We have systematically studied the influences of the film thickness of S5 on their photovoltaic performance, and a low concentration of S5 with a thinner HTM film is favorable for obtaining higher solar cell efficiency. S5 shows excellent energy alignment with perovskite as well as high-quality thin film formation, and the PSCs based on S5 as HTMs show remarkable power conversion efficiency (PCE) of 14.90% with a much higher short-circuit photocurrent than that for conventional HTM spiro-OMeTAD (PCE = 13.01%). We conclude that the superior photocurrent for S5 is mainly attributed to the enhanced interfacial hole transfer kinetics as well as the high hole conductivity. In addition, we have investigated the stability of N-annulated perylene derivative as HTMs in PSCs devices, showing that the unencapsulated devices based on S5 demonstrate outstanding stability by remaining 85% of initial PCEs in ambient condition with a relative humidity of ~30–45% for 500 h, while for devices with spiro-OMeTAD the cell efficiency degrade to 57% of initial performance at the same conditions.
关键词： High stability,N-annulated perylene,Hole-transporting materials,Perovskite solar cells
更新于2025-09-16 10:30:52
-
[IEEE 2019 6th International Conference on Space Science and Communication (IconSpace) - Johor Bahru, Malaysia (2019.7.28-2019.7.30)] 2019 6th International Conference on Space Science and Communication (IconSpace) - Integration of NiO Layer as Hole Transport Material in Perovskite Solar Cells
摘要： A successful integration of inorganic hole transporting material (HTM) for perovskite become one of the major concerns due to the instability issue with organic HTM. Inorganic NiO films as an efficient HTM for the inverted perovskite solar cell has been deposited by electron beam vapor deposition (EBPVD) technique instated of solution process. The X-Ray diffraction (XRD) peak of as-deposited substrate corresponding to (1 1 1) and (2 0 0) plane are dominating. The non-stoichiometry (1 1 1) in NiO thin film formation at influence its charge transfer characteristics. The FESEM confirms the successful non-stoichiometric deposition of NiO on FTO glass in an elemental wt% of O2 (15.82) and Ni (23.62). The perovskite structure of solar cells are fabricated Glass/TCO/NiO/Perovskite/PCBM/BCP/Ag. The deposited perovskite solar cells show higher power conversion efficiency (PCE) 10.80% with short circuit current density (Jsc) of 15.13 (mA cm-2), open circuit voltage (Voc) of 0.967 (V), field factor (FF) of 73.83 (%) which also allows thinking of an alternative HTL other than organic HTL for realistic commercial purpose.
关键词： Perovskite solar cell,hole transporting materials,nickel oxide,vapor deposition technique,power conversion efficiency
更新于2025-09-16 10:30:52
-
Planar perovskite solar cells using triazatruxene-based hyperbranched conjugated polymers and small molecule as hole-transporting materials
摘要： Conjugated polymers have been widely used as hole-transporting materials (HTMs) in planar perovskite solar cells (p-PSCs) and play a vital role in hole transport. In this work, based on triazatruxene (TAT), two hyperbranched conjugated polymers (named as TATF8HBP and TATSFHBP) and a star-shaped carbazole-functionalized small molecule (named as TATCz3) are employed as HTMs in p-PSCs with a well solubility. The differences of these materials between carrier mobility, hole extraction and transmission are investigated due to their discrepancy in molecular structure, leading to their photovoltaic performances sequence as follows: TATF8HBP (11.11%) > TATSFHBP (9.48%) > TATCz3 (0.87%). In addition, the short-circuit current density (Jsc), open circuit voltage (Voc) and fill factor (FF) of p-PSCs show the same trend as PCE does. The results reveal that TATF8HBP exhibits the best performance as a hole-transporting layer (HTL) since the polymer chain and its fluorene unit contribute to the hole transport.
关键词： perovskite solar cells,hyperbranched polymer,triazatruxene derivative,photovoltaic characteristics,hole-transporting materials
更新于2025-09-16 10:30:52