Research Highlights: Deuteration-enhanced neutron contrasts to probe amorphous domain sizes in organic photovoltaic bulk heterojunction films

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Organic photovoltaics (OPVs) is a promising third-generation PV technology due to its unique advantages including tuneable absorption spectrum, mechanical robustness, and low cost upon upscaling. However, the similar chemical structures of the donor (D) and acceptor (A) materials constituting the OPV photo-active layer renders its morphology characterization challenging.

In this work, we resolved this problem by combining grazing-incidence small-angle neutron scattering (GISANS) with targeted deuteration.… Read More

Research Highlights: CsPbI3 Perovskite Quantum Dot-Based WORM Memory Device with Intrinsic Ternary States

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The migration of mobile ionic halide vacancies is usually considered detrimental to the performance and stability of perovskite optoelectronic devices. Taking advantage of this intrinsic feature, we fabricated a CsPbI3 perovskite quantum dot (PQD)-based write-once-read-many-times (WORM) memory device with a simple sandwich structure that demonstrates intrinsic ternary states with a high ON/OFF ratio of 103:102:1 and a long retention time of 104 s.… Read More