Fig. 1. Schematic representation of the synthesis device

Fig. 2. Diagram of device structure

Fig. 3. TEM images of nanoparticles synthesized by different oleamine volumes

Fig. 4. Uv-vis absorption spectra of nanoparticles synthesized with different volumes of dibenzyl ether

Fig. 5. The XRD diffraction pattern of CuIn_0.7Ga_0.3S₂ nanoparticles

Fig. 6. The HRTEM and SAED images of CuIn_0.7Ga_0.3S₂ nanoparticles

Fig. 7. Dispersion of nanoparticles in toluene, p-xylene and cyclohexane

Fig. 8. Cross-sectional SEM images of device prepared by toluene, p-xylene and cyclohexane nanoparticle inks

Fig. 9. Device J‑V curves prepared by toluene, p-xylene, cyclohexane nanoparticle inks