Abstract: (8767 Views)
With increasing energy demand and depletion of fossil fuel resources, it is pertinent to explore the renewable and eco-friendly energy resource to meet global energy demand. Recently, perovskite solar cells (PSCs) have emerged as plausible candidates in the field of photovoltaics and considered as potential contender of silicon solar cells in the photovoltaic market owing to their superior optoelectronic properties, low-cost and high absorption coefficients. Despite intensive research, PSCs still suffer from efficiency, stability, and reproducibility issues. To address the concern, the charge transport material (CTM) particularly the electron transport materials (ETM) can play significant role in the development of efficient and stable perovskite devices. In the proposed research, we synthesized GO-Ag-TiO2 ternary nanocomposite by facile hydrothermal approach as a potential electron transport layer (ETL) in a regular planar configuration-based PSC. The as synthesized sample was examined for morphological, structural, and optical properties using XRD, and UV-Vis spectroscopic techniques. XRD analysis confirmed the high crystallinity of prepared sample with no peak of impurity. The optimized GO-Ag-TiO2 ETL exhibited superior PCE of 8.72% with Jsc of 14.98 mA.cm-2 ,Voc of 0.99 V, and a fill factor of 58.83%. Furthermore, the efficiency enhancement in comparison with reference device is observed which confirms the potential role of doped materials in enhancing photovoltaic performance by facilitating efficient charge transport and reduced recombination. Our research suggests a facile route to synthesize a low-cost ETM beneficial for the commercialization of future perovskite devices.
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We synthesized the GO-Ag-TiO2 ternary nanocomposite by a facile hydrothermal technique to analyze the impact of silver (Ag) and graphene oxide (GO) doping on the photovoltaic performance of perovskite solar cells.
The SEM images disclosed the formation of nanoparticles and nanosheets owing to Ag and GO doping. XRD analysis confirmed the crystalline structure of ternary nanocomposite with no peak of impurity. UV-Vis spectroscopic studies revealed the reduction in band gap favorable for high light absorption.
The photoluminescence (PL) emission spectroscopy confirmed the efficient charge extraction by GO-Ag-TiO2 ETL due to reduced trap states and less recombination centers. Further, the perovskite deposited on ITO/GO-Ag-TiO2 ETL exhibited dense and uniform surface coverage beneficial for fast charge transport.
The GO-Ag-TiO2 ternary nanocomposite as ETL in a perovskite solar cell demonstrated the favorable PCE of 8.72% with Jsc of 14.98 mA.cm-2 ,Voc of 0.99 V, and a fill factor of 58.83%. The efficiency of the modified device was found almost 33 % higher than the pristine TiO2 based device. The efficiency enhancement is attributed to fast charge carrier extraction by the ETL and reduced recombinations owing to smooth and crack free surface coverage.
This research work provides pavement for the fabrication of low-cost perovskite devices by employing GO-Ag-TiO2 ETL due to synergistic effect of silver and graphene oxide.
Type of Study:
Research Paper |
Subject:
Composites