Studies of Graphdiyne‐ZnO Nanocomposite Material and Application in Polymer Solar Cells

Abstract

Graphdiyne-ZnO (GDZO) composite material is prepared via a simple method and studied in detail for the first time. The transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) analyses confirm the formation of an adduct between GD and ZnO. Then the interaction between ZnO and GD is further investigated by first-principles calculations. It is found that the Zn and O atom can coordinate bonding with GD, thus forming the C─Zn bond and C─O bond, respectively. Polymer solar cells are fabricated based on the nanocomposites for the first time and an enhanced power conversion efficiency of 11.2%, compared with the devices with ZnO-only (10%), is obtained. Simultaneously, the resultant devices show better stability, whether in glove box or in atmosphere, with humidity of 90%. The investigation of exciton generation rate, ideal current-voltage model, and impedance spectra verify that the introduction of GDZO not only accelerates electron transfer but also reduces charge recombination occurring at the interface. The results indicate that GDZO is a promising electron transport material to enhance solar cell performance and presents a large potential for optoelectronic applications as well.

Inverted MAPbI3 Perovskite Solar Cells with Graphdiyne Derivative‐Incorporated Electron Transport Layers Exceeding 20% Efficiency

“…An appreciable increase in the semicircle diameters (Figure g) indicates a better interfacial contact between perovskite and ClGD‐PCBM film compared with pure PCBM, resulting in the decrease in charge recombination at the interface and the improvement of FF . Corresponding bode EIS spectra (Figure S5, Supporting Information) demonstrate that ClGD‐PCBM ETLs have a higher electron density and faster electron transfer (1.59 μs) compared with PCBM ETLs (2.57 μs), which further supports the results of electron mobility and PL . We proposed that the faster electron transfer reduces charge accumulations between the perovskite active layer and electrode, leading to a decrease in J – V hysteresis .…”

“…It is shifted to 1434.3 cm −1 upon formation of the ClGD‐PCBM. Such a shift implies the formation of the interaction between C 60 (main body of PCBM) and ClGD . Moreover, in comparison with unbonded ClGD, the vibration of acetylenic linkages (—C—C≡C—C—) of ClGD‐PCBM at around 2191.9 cm −1 was weakened, which may be attributed to the decline of the energy of the corresponding phonon modes due to the existence of π–π interaction between ClGD and PCBM .…”

NdCl3 Dose as a Universal Approach for High-Efficiency Perovskite Solar Cells Based on Low-Temperature-Processed SnOx

“…The effect of the dosed NdCl 3 on nonradiative recombination was also checked by the dark current curves and electrochemical impedance spectroscopy (EIS) of PvSCs. The reverse saturation current density ( J 0 ) was calculated , as 2.89 × 10 –5 mA/cm 2 for the c-SnO x -based device and 1.43 × 10 –6 mA/cm 2 for the SnO x :NdCl 3 -based device, respectively (see Figure S13a). As is known, the lower J 0 indicated less nonradiative recombination, which would lead to an improvement in V OC .…”

Chemistry, Functionalization, and Applications of Recent Monoelemental Two-Dimensional Materials and Their Heterostructures

“…GDY has been applied in polymer solar cells, , perovskite solar cells, − fuel cells, and photocatalysis fields. , Xiao et al reported perovskite solar cells using GDY as a dopant in the hole-transporting material (HTM) layer of poly­(3-hexylthiophene) (P3HT) (as shown in Figure A) . The results of Raman spectra and UV electron spectra exhibited that between the GDY particles and P3HT a strong π–π stacking interaction is observed, which is beneficial for hole transport and improved performance.…”