1 research outputs found
In Situ-Grown 2D Perovskite Based on π‑Conjugated Aggregation-Induced Emission Organic Spacer Boosting the Efficiency and Stability of 2D–3D Heterostructured Perovskite Solar Cells
The two-dimensional–three-dimensional
(2D–3D)
heterostructured
perovskite solar cells (PSCs) have drawn widespread interest, wherein
the organic spacer plays a significant role in the photovoltaic performance.
Herein, a novel π-conjugated organic spacer with the aggregation-induced
emission (AIE) property, (Z)-2-([1,1′-biphenyl]-4-yl)-3-(5-(4-(3-aminopropoxy)phenyl)thiophen-2-yl)acrylonitrile
(BPCSA-S), is designed and synthesized, which is successfully applied
for the in situ construction of 2D–3D heterostructured PSCs
via the two-step solution method. By virtue of the functional groups
(i.e., cyano, thiophene, and amino) in BPCSA-S, the BPCSA-S organic
spacer can trigger the in situ growth of 2D perovskites, which will
serve as the template for the heteroepitaxial growth of 3D perovskites,
thus obtaining a 2D–3D heterostructured film with high-quality
and few defects. More pleasingly, benefiting from the AIE property
and delocalized π-electrons in the π-conjugated BPCSA-S
organic spacer, excellent photosensitization process and carrier transport
can be achieved. Consequently, the resultant 2D–3D heterostructured
PSCs yield a pleasing PCE of 22.07%, accompanied by mitigatory hysteresis,
as well as enhanced stability. Our research shows a hopeful multifunctional
organic spacer approach using the novel π-conjugated AIE organic
spacer for high-performance PSCs