• Energy Research

Low-toxicity perovskite-inspired Cu2AgBiI6 is a potential candidate for indoor photovoltaics. Cu2AgBiI6-based photovoltaics with an optimized mesoporous TiO2 thickness ensure high fill factor and a power conversion efficiency of 4.64% at 200 lux.

Phase-pure and highly crystalline AgBiI4 NCs are synthesized by hot-injection synthesis route. The iodine-rich surface of the NCs enable their impressive long-term environmental and thermal stabilities. This study shines light on the surface-electronic structure relationship for AgBiI4 NCs.

A low-cost approach for unconventional hole-transporting materials is reported. Their sustainable combination with the sole tert-butyl pyridine as an additive unprecedently stabilises the corresponding perovskite solar cells up to 400 days.

In this work, we introduce P3HT (poly(3-hexylthiophene-2,5-diyl)) as an efficient hole transport material (HTM) for lead-free Cs3Sb2I9 perovskite-inspired solar cells.

Ag3BiI6 (ABI) is one of the most widely explored lead‐free perovskite‐inspired materials for eco‐friendly solar cell applications. However, despite the intense research efforts, the photovoltaic performance of ABI‐based devices remains very modest, primarily due to poor film morphology and ineffective charge extraction. This work aims at investigating the potential benefits of a thermally evaporated cesium iodide (CsI) interlayer on the performance of ABI‐based solar cells. Upon the addition of CsI atop the ABI layer in the device stack, the solar cells deliver a power conversion efficiency (PCE) of 2.27%. This is the highest efficiency reported for ABI solar cells employing a similar device architecture. It is found that the enhancement in PCE is largely due to improvement in the ABI|hole transport layer interface upon the introduction of CsI interlayer. The improvement is largely ascribed to enhanced surface coverage upon introduction of CsI interlayer, as evidenced by our comprehensive microscopy studies. Furthermore, impedance spectroscopy analysis is employed to provide further insights into the changes in charge transfer dynamics interlayer that dictate the enhancement of fill factor and short‐circuit current density in the devices. The findings indicate that the addition of CsI promotes charge transfer and minimizes recombination losses.

All inorganic perovskite solar cells lead to extended device lifespan in an accelerated ageing test.

Tuning the energy levels of halide perovskite by controlling the deposition of dipolar self-assembled monolayers.