Optimisation of Polyacrylic Acid Usage as Surfactant in Hydrothermally Synthesised Cu2ZnSnS4 Thin Films for Application as Counter Electrode in Dye Sensitised Solar Cell. njap [Internet]. 2025 Sep. 30 [cited 2025 Oct. 2];1(1):99-109. Available from: https://njap.nipngr.org/index.php/njap/article/view/22