2023年1月4日 · Here, for the first time, vacuum-based evaporation of the most common carbazole-based SAM-HTLs (2PACz, MeO-2PACz, and Me-4PACz) is reported. X-ray photoelectron spectroscopy and infrared spectroscopy demonstrate no observable chemical differences in the evaporated SAMs compared to solution-processed counterparts.

2025年1月13日 · The orientation of the 2PACz molecule was investigated by angle-dependent XPS measurement (Figure 4a). Since the ITO substrate is less flat than the HOPG substrate, the difference of N 1 s and P 2 p became smaller, but sufficient to show that nitrogen signal is higher than phosphorus signal at grazing angles.

2022年3月30日 · We report on bulk-heterojunction (BHJ) org. photovoltaics (OPVs) based on the self-assembled monolayer (SAM) 2PACz as a hole-selective interlayer functionalized directly onto the indium tin oxide (ITO) anode. The 2PACz is found to change the work function of ITO while simultaneously affecting the morphol. of the BHJ deposited atop.

2023年11月1日 · X-ray photoelectron spectroscopy (XPS) revealed the interaction of P-O − group (anchoring phosphonic acid group) of SAM with S + in PEDOT:PSS, resulting in an improved work function at the HTL as observed through ultraviolet photoelectron spectroscopy (UPS). The XRD analysis indicated a preferred orientation of crystallographic planes for HTL ...

2024年8月29日 · We use X-ray photoelectron spectroscopy (XPS) to determine the thickness of 2PACz and realize that the optimized as-deposited spray-coated 2PACz thickness is above that of a monolayer. Furthermore, we find a correlation between the work function (WF) and the thickness of 2PACz.

2021年12月22日 · The presence of MeO-2PACz on metal oxides is evidenced from X-ray photoelectron spectroscopy (XPS) and Rutherford backscattering spectrometry (RBS). Transmission electron microscopy (TEM) imaging complemented by spectroscopic ellipsometry (SE) indicate a higher density of molecules on the surface of NiO.

2023年10月23日 · We began by looking at the case of 2- (9 H -carbazol-9-yl)ethyl)phosphonic acid (2PACz), an organic molecule (Fig. 1a) capable of forming SAMs on TCOs 14, and investigated its interactions with...

2024年4月8日 · The XPS results indicate an over 40% decrease of the C–N bond intensity for the aged MeO-2PACz after aging under UV light, which is associated with the damage of the carbazole core (Figure 7f). In contrast, the C–N bond intensity of MeO-PhPACz showed almost no changes after the UV aging, indicating that the carbazole-based conjugated ...

2024年9月1日 · In this study, we propose a co-adsorb (CA) strategy employing a novel small molecule, 2-chloro-5-(trifluoromethyl)isonicotinic acid (PyCA-3F), introducing at the buried interface between 2PACz...

2022年5月15日 · The device with bilayer consisting of 2PACz monolayer on PEDOT-PSS (PEDOT-PSS/2PACz) gave a higher performance of the efficiency of 8.66%, short-circuit photocurrent density (Jsc) of 16.22 mA cm −2, open-circuit photovoltage (Voc) of 0.74 V, and fill factor (FF) of 0.73