Bromide‐based organo‐metal halide perovskites have shown great potential for use in tandem solar cells, LEDs and photodetectors. Here, we report a new protocol using a one‐step deposition method for producing formamidinium lead bromide (FAPbBr3) perovskites, which features a solvent engineered intermediate phase to achieve superior films. For the first time, an FABr‐PbBr2‐DMSO intermediate is identified

Efficient organic photovoltaic cells (OPVs) were fabricated by employing two structurally similar Y6 derivations (BTP‐BO‐4F, Y6‐1O) as acceptor and PM6 as donor. The two binary OPVs exhibit high fill factor (FF) (>76%), the complementary short‐circuit‐current density (JSC) of 25.33 mA/cm2 vs. 23.52 mA/cm2 and open‐circuit voltage (VOC) of 0.845 V vs. 0.904 V. The high FFs of binary OPVs indicate the

The photovoltaic properties and energy losses of organic solar cells (OSCs) based on non‐fullerene acceptors (NFAs) are highly dependent on their molecular structures and aggregation morphologies. Charge carrier and light management is important to optimize NFA molecules. In this work, four NFAs with different alkyl substituents and end groups named as BTP‐C11‐N2F, BTP‐C9‐N2F, BTP‐C9‐IC4F, and BTP‐C9‐N4F

Semi‐transparent organic solar cells (STOSCs) have received increasing attention due to promising applications such as building integrated photovoltaics. Successful commercialization requires that STOSCs are aesthetically pleasing as well as having balanced power conversion efficiencies (PCE) and average visible transmittances (AVTs). Non‐fullerene acceptors (NFAs), which possess excellent electrical/chemical

Photocatalytic CO2 reduction into value‐added fuels is an appealing avenue in response to the global warming and energy crisis, but it still suffers from high energy barriers, low conversion efficiencies and poor photostabilities. Herein, we designed a novel S‐scheme SnNb2O6/CdSe‐diethylenetriamine (SNO/CdSe‐DET) heterojunction by a microwave‐assisted solvothermal process, composed of 2D ultrathin

Light harvesting is central to many photonic materials. The light harvesting efficiency in these materials is, however, generally reduced because upper excited‐state energy is lost by energy‐dissipating internal conversion and vibrational relaxation processes. Here, we report size‐dependent energy harvesting from nonthermalized, upper excited states of glutathione‐protected gold clusters of various

Capacitive response at long timescale seems to remain an elusive feature in the analysis of the electrical properties of perovskite‐based solar cells. It belongs to one of the critical anomalous effects that arises from the characteristic phenomenology of this type of emerging photovoltaic devices. Thereby, accurately deducing key capacitance feature of new light harvesting perovskites from electrical

Crystalline, dense and uniform perovskite thin films are crucial for achieving high power conversion efficiency solar cells. Here, we demonstrated a universal method of fabricating highly crystalline and large‐grain perovskite films via crystal engineering. We applied anion exchange of Cl− and I−, and annealing perovskite films, in an ultra‐confined and uniform temperature enclosed space with saturated

In this work, it is demonstrated, by using industrial techniques that a passivation layer with nanocontacts based on silicon oxide (SiOx) leads to significant improvements in the optoelectronical performance of ultrathin Cu(In,Ga)Se2 (CIGS) solar cells. Two approaches were applied for contact patterning of the passivation layer: point contacts and line contacts. For two CIGS growth conditions, 550

Electron transport materials (ETM) are considered a keystone component of third‐generation solar cells. Among the alternative ETM, metal oxide bilayers have attracted increasing attention due to their easy processing and tune‐ability of cascade energy alignment. Herein, a metal oxide bilayer that combines ZnO and TiO2 compact films (ZnO/TiO2) has been implemented as ETM for solution‐processed Sb2S3

Oxide semiconductors like TiO2 and SnO2 are exclusively employed to construct electron transport layer (ETL) in n‐i‐p structured perovskite solar cells (PSCs). Despite high electron mobility and suitable energy levels, their complicated surface chemistry is detrimental to the interfacial stability as well as fabrication reproducibility. Alternatively, organic n‐type semiconductors may address these

Who would have thought back in January 2020 that a hitherto unknown virus would make its march through Asia, Europe, the US, and almost all countries in the world? In order to prevent the coronavirus from spreading, the world governments have imposed measures of social distancing and forced us to lock down. According to the International Energy Agency (IEA), industrial slowdown, together with major