19shows that, if the built-in voltage (VBI) is not offset with the pre-bias of the FH measurement (that is,Vpre < VBI), theVOCdecreases with increasingnION. Considering that such aVOCdecrease (and QFLS–eVOCmismatch) is observed in various systems (Supplementary Figs.4–7) points t...
we fabricated PSCs with the architecture of ITO/SnO2/(HBPs)/perovskite/spiro-OMeTAD/Au, as illustrated in Fig.2a. The HBPs modification resulted in an improved solar cell performance. The optimal HBPs concentration was attained from the current density–voltage (J–V) curves in Supplementary ...
Then, important device and material parameters are studied and it is found that an efficiency regime of 30% can be unlocked by optimizing the built-in voltage across the perovskite layer using either highly doped (1019 cm~(-3)) transport layers (TLs), doped interlayers or ultrathin self-...
Using this knowledge, the team then designed and built a triple-junction cell with this composition. They measured its efficiency at 24.3 percent with an open-circuit voltage of 3.21 volts. They also sent it to be independently certified by the National Renewable Energy Laboratory, which measured ...
Even though the flexible cells had a slightly lower open circuit voltage (VOC), likely due to an increase in the thickness of the device,28 the latter outperformed planar devices, delivering a PCEAVE of 13.6% (PCEMAX = 14.4%), compared to PCEAVE = 11.9% (PCEMAX = 13.4%) for planar ...
Hole transport material (HTM)-free perovskite solar cells was simulated.Deeper work function than valence band of absorber maintained high built-in voltage.Shallower work function than valence band of absorber decreased built-in voltage.Adequate work function gave similar high efficiency without HTM.This...
36,43 Thus, great care needs to be exercised during the SEM observation of MHP thin films to reduce electron-beam damage and avoid this artifact, such as using lower accelerating voltage and shorter exposure durations to the electron beam.36,43 Otherwise, this artifact can result in serious ...
Additionally, through analysis of the p–p isotype heterojunction, it was observed that the built-in potential formed by (BA)2PbI4 exists in the 2D layer, whereas the introduction of (BA)2PbBr4 shifted the formation of the built-in potential to the 3D layer. The device with a 3D/(BA...
As a consequence, less collection of photogenerated carriers is predicted due to the built-in electric field is partially screened. Here, the ions induced electric field is experimentally demonstrated by exploring the external quantum efficiency (EQE) spectra under various forward voltage biases. The ...
in parallel to the NI9205 acquisition card. The operating voltage of the photodetector is –0.3 V. The signal of each pixel is recorded by the computer when the LED was placed in each position. The data matrix is obtained by the different values of the response of each pixel to the ...