Agoro Mojeed A, Meyer Edson L, Olayiwola Olufemi I
Fort Hare Institute of Technology, University of Fort Hare, Private Bag X1314, Alice, 5700, Eastern Cape, South Africa.
Department of Chemistry, University of Fort Hare, Private Bag X1314, Alice, 5700, Eastern Cape, South Africa.
Discov Nano. 2024 Aug 19;19(1):130. doi: 10.1186/s11671-024-04082-w.
Three different modified solar cells have been passivated with copper sulfide (CuS) on a TiO electrode and manganese sulfide (γ-MnS) hexagonal as photon absorbers. The MnS were prepared using (a-c) bis(N-Piperl-N-p-anisildithiocarbamato)Manganese(II) Complexes Mn[N-Piper-N-p-Anisdtc] as (MnS_1), N-p-anisidinyldithiocarbamato Mn[N-p-anisdtc] as (MnS_2) and N-piperidinyldithiocarbamato Mn[N-piperdtc] as (MnS_3). The corresponding passivated films were denoted as CM-1, CM-2, and CM-3. The influence of passivation on the structural, optical, morphological, and photochemical properties of the prepared devices has been investigated. Raman spectra show that the combination of this heterostructure is triggered by the variation in particle size and surface effect, thus resulting in good electronic conductivity. The narrow band gaps could be attributed to good interaction between the passivative materials on the TiO surface. CM-2 cells, stability studies show that the cell is polarized and current flows due to electron migration across the electrolyte and interfaces at this steady state. The cyclic voltammetry (CV) curve for the CM-3 with the highest current density promotes the electrocatalytic activity of the assembled solar cell. The catalytic reactions are further confirmed by the interfacial electron lifetimes in the Bode plots and the impedance spectra. The current-voltage (J-V) analysis suggests that the electrons in the conduction band of TiO/CuS recombine with the semiconductor quantum dots (QDs) and the iodolyte HI-30 electrolyte, resulting in 5.20-6.85% photo-conversions.
三种不同的改性太阳能电池已在TiO电极上用硫化铜（CuS）和六方硫化锰（γ-MnS）作为光子吸收剂进行了钝化处理。使用（a-c）双（N-哌啶-N-对茴香基二硫代氨基甲酸盐）锰（II）配合物Mn[N-哌啶-N-对茴香基二硫代氨基甲酸盐]制备了MnS作为（MnS_1），N-对茴香基二硫代氨基甲酸盐Mn[N-对茴香基二硫代氨基甲酸盐]作为（MnS_2），N-哌啶基二硫代氨基甲酸盐Mn[N-哌啶基二硫代氨基甲酸盐]作为（MnS_3）。相应的钝化膜分别记为CM-1、CM-2和CM-3。研究了钝化对所制备器件的结构、光学、形态和光化学性质的影响。拉曼光谱表明，这种异质结构的结合是由粒径变化和表面效应引发的，从而导致良好的电子导电性。窄带隙可归因于TiO表面钝化材料之间的良好相互作用。CM-2电池的稳定性研究表明，在这种稳态下，电池由于电子在电解质和界面之间迁移而发生极化并产生电流。具有最高电流密度的CM-3的循环伏安（CV）曲线促进了组装太阳能电池的电催化活性。Bode图和阻抗谱中的界面电子寿命进一步证实了催化反应。电流-电压（J-V）分析表明，TiO/CuS导带中的电子与半导体量子点（QDs）和碘化物HI-30电解质复合，导致光转换率为5.20-6.85%。
