Impact of Li and K co-doping on the optoelectronic properties of CZTS monograin powder

• DOI: 10.1016/j.solmat.2023.112182
• Publication Date: 2023-01-06T23:20:48Z
• Authors: Katri Muska; Kristi Timmo; Maris Pilvet; Reelika Kaupmees; Taavi Raadik; Valdek Mikli; Maarja Grossberg-...; Jüri Krustok; Raavo Josepson; Sven Lange; Marit Kauk-Kuusik
• Keywords: Powder Diffraction

In this work, the impact of Li and K co-doping on properties Cu2ZnSnS4 (CZTS) monograin powders used as absorber materials in layer (MGL) solar cells was investigated. CZTS were grown liquid phase flux with different LiI-KI ratios by synthesis-growth method. According to Atomic Absorption Spectroscopy, amount host material did not depend molar ratio LiI KI mixtures remined constant at 0.01 at%. However, concentration depended initial mixture increased from at% 1.22 synthesized CZTS. X-ray diffraction, Raman analysis photoluminescence (PL) confirmed that content x = 0.2 0.4 input composition (Cu1-xLix)1.84Zn1.09Sn0.99S4 resulted formation solid solution. The external quantum efficiency measurements showed effective bandgap energy 1.52 eV 1.57 increasing 0–0.02 0.4, respectively. mean values VOC corresponding 700 742 mV. highest 784 mV obtained device based solution containing (x 0.4). best performing cell power conversion 9.4% co-doped powder 0.002) showing output parameters: 718 mV, JSC 20.9 mA/cm2 FF 62.5%.