Study on the interface defects of eco-friendly perovskite solar cells

Insight into Controlled Surface Passivation of PEDOT:PSS for Defect Density Modulation and Efficient Charge Transport for Perovskite Solar Cells

“…With less distribution and large defect density, the charge carrier mobility may be hampered. Due to the coulombic interaction between the charge carrier and defect states, the defect capture cross section assisted the recombination losses, raises the density of state, and produces another deep trap, and it reduces the carrier charge transportation . The grain size increases from 201.7 to 444.3 nm between the untreated to treated one, and after 20 min of treatment, the grain size decreases to 103.2 nm, which affects defect density ( N t ) significantly.…”

“…Due to the coulombic interaction between the charge carrier and defect states, the defect capture cross section assisted the recombination losses, raises the density of state, and produces another deep trap, and it reduces the carrier charge transportation. 56 The grain size increases from 201.7 to 444.3 nm between the untreated to treated one, and after 20 min of treatment, the grain size decreases to 103.2 nm, which affects defect density (N t ) significantly. The large grain size perovskite film has the lowest trap density deep traps, which confirms that the plasma treatment technique is one of the most efficient ways for trap passivation within boundaries and at the interface of perovskite solar cells.…”

Unraveling the Potential Pathways for Improved Performance of EDA0.01(GA0.06(FA0.8Cs0.2)0.94)0.98SnI2Br‐Based Solar Cells

“…This is likely because electrons move faster than holes and are less susceptible to being trapped by defects at the absorber/ETL interface. [ 60 ]…”

“…This is likely because electrons move faster than holes and are less susceptible to being trapped by defects at the absorber/ETL interface. [60] Additionally, Figure 7f presents the plot of PCE against σ p for all three N it values. It illustrates the degradation of PCE as σ p increases.…”

Boosting Perovskite Solar Cell Stability through a Sputtered Mo-Doped Tungsten Oxide (WOx) Electron Transport Layer

“…Perovskite solar cells (PSCs) have recently gained significant research attention due to the outstanding optoelectronic properties of perovskites (PSKs). These properties include tunable optical band gaps ranging from 1.2 to 3.17 eV, high absorption coefficients, low excitation binding energy, longer carrier diffusion lengths, and ease of processing in liquid solutions, which makes them affordable. − Despite their poor stability with a lifespan of a few hours, recent advancements have achieved a certified power conversion efficiency (PCE) of 26.1% . In PSCs, the electron transport layer (ETL) plays a crucial role in the device’s performance, transporting photogenerated electrons while blocking holes to eliminate electrical shunt and optimize PSC efficiency. , For this reason, it must be defectless, pinhole-free, compact, and uniform in thickness. − Additionally, the ETL’s energy level alignment, charge mobility, morphology, and interface properties are critical to fabricating efficient PSCs .…”