Anti-solvent mixture-mediated reduction of photocurrent hysteresis in high-impurity perovskite precursor based MAPbI3 solar cells

Stable and efficient soft perovskite crystalline film based solar cells prepared with a facile encapsulation method

“…On the first day, the forward and backward J – V curves show a weak J SC hysteresis (see Fig. 3(a)), which indicates that some iodine vacancies were formed in the inner region of the perovskite crystalline thin film, 32,33 as shown in Fig. 3(d).…”

Stable and Efficient Graded MA0.83Cs0.17Pb(I0.83Br0.17)3 Alloy Thin Film‐Based Inverted‐Type Perovskite Solar Cells

“…In general, the smaller Urbach energy corresponds to the better crystallinity (lower defect density). [ 44–47 ] The trend of the Urbach energy values is inversely proportional to the trends of the FF and PCE (see Table 1), which means that the crystallinity (defect density) of the MA x Cs 1− x Pb(I x Br 1− x ) 3 alloy thin films dominates the photovoltaic performance of the resultant solar cells.…”

Understanding the PEDOT:PSS, PTAA and P3CT-X Hole-Transport-Layer-Based Inverted Perovskite Solar Cells

“…In the inverted perovskite solar cell, the p-type polymers and p-type metal oxides are widely fabricated on top of the ITO/glass substrates with a post-thermal annealing process at about 100 °C. The high-quality perovskite crystalline thin films can be fabricated by using the two-step spin coating method with an interdiffusion process [ 71 , 72 , 73 ], the one-step spin coating method with a washing-enhanced nucleation (WEN) process [ 74 , 75 , 76 ] and the vacuum thermal co-evaporation technique [ 77 , 78 , 79 ]. The organometal trihalide perovskite can be CH 3 NH 3 PbI 3 (MAPbI 3 ), CH(NH 2 ) 2 PbI 3 (FAPbI 3 ) and Cs x (MA y FA 1−y ) 1−x Pb(I z Br 1−z ) 3 , mainly due to the low absorption bandgap [ 80 , 81 , 82 ], large absorption coefficient [ 83 , 84 , 85 ], small exciton binding energy [ 86 , 87 , 88 ], long exciton (carrier) lifetime [ 89 , 90 , 91 ] and high carrier mobility [ 92 , 93 , 94 ].…”