Reduced energy loss enabled by thiophene-based interlayers for high performance and stable perovskite solar cells

Abstract

High performance and stable perovskite solar cells have been fabricated by utilizing thiophene-based interlayers to reduce the energy loss at the SnO2/MAPbI3 interface.

A “double-sided tape” modifier bridging the TiO2/perovskite buried interface for efficient and stable all-inorganic perovskite solar cells

“…1b, the Ti 2p 3/2 and Ti 2p 1/2 states in TiO 2 exhibit the sharp characteristic peaks at 458.73 and 464.31 eV, respectively, which shi slightly in the direction of lower binding energies (458.44 and 464.15 eV) for the DAP modied TiO 2 sample, illustrating that more negative charges surround Ti atoms through bonding with the hydrogen phosphate anion in DAP. 35 Furthermore, as shown in the FTIR spectra in Fig. S2, † the presence of the P-O bond at a lower wavenumber for the TiO 2 /DAP sample in comparison with that for DAP also demonstrates an interaction between the hydrogen phosphate anion in DAP and TiO 2 , crossvalidating the analysis shown in Fig.…”

“…27,[36][37][38][39][40][41][42][43] For the DAP modied TiO 2 sample, O 1s shis to a lower binding energy compared to that for the control one, which further evidences the interaction between DAP and TiO 2 . 35 Besides, the component concentration of O L and O D can be reected by the area ratio of the corresponding peaks, and aer modifying the TiO 2 lm with DAP, the area ratio of O L : O D is increased from 67.4 : 32.6 to 72.9 : 27.1, strongly indicating that the hydrogen phosphate anion combines with the oxygen vacancy of the TiO 2 lm to reduce the concentration of O D along with the simultaneous formation the lattice oxygen for an increased O L concentration, 20,44 which cross-veries the above analysis results and fully demonstrates that the modication of DAP effectively passivates the oxygen vacancy defects on the TiO 2 lm surface. The healing of TiO 2 oxygen vacancy defects can contribute to effective extraction of electrons to improve J SC .…”

Assessing the Impact of Ambient Fabrication Temperature on the Performance of Planar CH3NH3PbI3 Perovskite Solar Cells

“…Efficient non-radiative recombination may additionally lead to a significant deterioration of the solar cell's stability, which is an important factor for their industrialization. [43,44] The electroluminescence of the solar cells prepared at different ambient temperatures was measured and is reported in Figure 7. Radiative emission was observed between the red and near infrared range with a λ max at ca.…”

“…They impact the open circuit voltage ( V oc ), short circuit current ( J sc ) and fill factor ( FF ), which results in a decrease of the overall solar cell performance. Efficient non‐radiative recombination may additionally lead to a significant deterioration of the solar cell‘s stability, which is an important factor for their industrialization [43,44] . The electroluminescence of the solar cells prepared at different ambient temperatures was measured and is reported in Figure 7.…”

Fabrication of stable perovskite solar cells with efficiency over 20% in open air using in situ polymerized bi-functional additives

“…The decreased W F is ascribed to the surface dipole moments associated with electron donation from the TFEMA dimers to the perovskite. 43 Furthermore, the obtained energy level alignment of the PSCs is schematized in Fig. 4c.…”