Crown ether effectively stabilizes the cubic phase of CsPbI3 to inhibit the moisture invasion and phase transformation of CsPbI3 films, producing large-area devices and improving device performance.
The incorporation of a Br-containing tetrabutylammonium salt into perovskite precursors demonstrates superior advantages in both crystallization and large-area uniformity control during the scalable blade-coating of perovskite films.
The long photoluminescence lifetime of the organic semiconductor materials is of great importance in assuring the photoexcited extion to have enough time to achieve successful separation at the interface and improving the performances of organic/inorganic hybrid solar cells. Unfortunately, many efforts have been devoted to the bandgap or molecular energy level control, whereas this viewpoint is rarely referred. Herein, we prepare a random D-A terpolymers based on PZT and BDT cores in conjugation with electron withdrawing BT unit and explore their applications in HSCs. Except for the energy level and the bandgap, the role that monomers ratio plays in photoluminescence lifetime is particularly involved. As a result, the average PL lifetimes of the terpolymer are significantly tuned. The optimized terpolymer exhibits a longer PL lifetime and prominent charge transfer ability, thus leading to a notable enhancement of PCE when compared with its counterparts, although their bandgaps and molecular energy levels are almost the same.
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