Insights and future perspectives for constructing efficient electron pathways in photoanodes of QDSSCs

Dissipation of Charge Accumulation and Suppression of Phase Segregation in Mixed Halide Perovskite Solar Cells via Nanoribbons

“…Also, it is interesting to note that the IPCE also increases substantially for the device with optimal GNR concentration (∼80%) compared to the architecture without GNR (∼35%). GNR is reported to enhance light absorption, charge injection, and collection in the TiO 2 systems and it proportionally increases with an increase in GNR concentration . The enhanced features observed are attributed to GNR strips that could cause electrons to move through the TiO 2 nanoparticles, which are interconnected by GNR channels, creating uninterrupted electron flow.…”

AgBiS2 as a photoabsorber for eco-friendly solar cells: a review

“…An efficient ETL can prevent major damage of intrinsic charge recombination taking place within the AgBiS 2 NCs. 64 Also, the effective transport of excited electrons to the transparent conductive materials reduces recombination losses taking place between the ETL and oxidised species in the absorber and electrolyte. It should be noted that there should be a favourable alignment of the energy levels of these charge transport layers with that of NCs for efficient charge carrier dynamics, as shown Fig.…”

Manifestation of the Enhanced Photovoltaic Performance in Eco-Friendly AgBiS2 Solar Cells Using Titanium Oxynitride as the Electron Transport Layer

“…One can see several reports on ETL modifications to enhance charge extraction from the photoabsorber to ETL to improve the device performance. ,, Creating an ETL with suitable band structures can lead to energy level optimization and favorable alignment for optimal charge extraction, reduced interfacial and surface recombination of charge carriers, and uninterrupted charge transport in the device. However, the energy level alignment is highly dependent upon the energy level positions of the adjacent interface layers, where it enables a proper built-in potential and favors a high charge transportation in solar cells …”

“…15 In the conventional AgBiS 2 device, deposited via the successive ionic layer adsorption and reaction (SILAR) method, mesoporous TiO 2 is often used as the ETL, which transfers the generated carriers from the photosensitizer (QDs) to the conductive substrate. 16 There are reports on the usage of ZnO and SnO 2 as ETLs for AgBiS 2 -based devices, which offer appropriate band alignments in the system, enabling efficient charge carrier dynamics across the interfaces. Also, several modifications on these ETLs reflected in boosting the device performance of AgBiS 2 .…”

“…However, the energy level alignment is highly dependent upon the energy level positions of the adjacent interface layers, where it enables a proper built-in potential and favors a high charge transportation in solar cells. 16 In this context, we have developed a titanium oxynitride system using a simple sol−gel-assisted nitridation process and employed it as the ETL for the first time in the AgBiS 2 -based QDSSC and achieved an enhanced performance via appropriate band alignment of materials in the device. Structural, optical, morphological, electrical, and PV properties of the developed titanium-oxynitride-based device have been studied in comparison to the device fabricated using conventional TiO 2 .…”