Advances in Organic and Perovskite Photovoltaics Enabling a Greener Internet of Things

Abstract

Organic and perovskite solar cells (PSCs) have made significant strides in the last couple of years achieving high power conversion efficiencies (18% and 29%, respectively) and exceptional stability. Ultra‐flexible and environmentally stable organic and PSCs can effectively operate under various illumination settings. Herein, novel device concepts that comprise photovoltaic cells alone or in tandem with batteries or supercapacitors, acting as the main power supply to another microelectronic component, enabling self‐powered electronics for the Internet of Things (IoT) are reviewed. Emphasis is placed on the specific requirements posed by such applications to pave the way to large scale commercialization. The importance of supporting a greener IoT ecosystem by eliminating toxic materials and solvents in the device fabrication process is highlighted.

Polarity and moisture induced trans-grain-boundaries 2D/3D coupling structure for flexible perovskite solar cells with high mechanical reliability and efficiency

“…The first strategy has been adopted in the case of ultra-thin f-PSCs. [24][25][26][27] The stress-neutral axis was shifted toward the MHP film thanks to using an ultrathin substrate (less than 10 mm), thereby enabling the stress on the MHP film to significantly alleviate. As a result, ultra-thin f-PSCs exhibited excellent mechanical stability while almost no PCE decrease was observed after 10 000 bending cycles.…”

Recent progress of transition metal-based catalysts as cathodes in O2/H2O-involved and pure Li–CO2batteries

“…Perovskite-type materials have attracted extensive attention due to their low price, thermodynamic stability, simple process, and good electrical conductivity. 154 Perovskite-type catalysts are special octahedral structures composed of A, B and O, with the chemical formula ABO 3 , where A represents rare earth metals and alkaline earth metals, and B represents traditional transition metals. The A site is coordinated with 12 electronegative O atoms due to its larger atomic radius, while the B site is usually coordinated with 6 electronegative O atoms (Fig.…”

Green‐solvent Processable Dopant‐free Hole Transporting Materials for Inverted Perovskite Solar Cells

“…[5] What's more, these highly performing HTMs must be processed through hazardous solvents such as chlorobenzene (CB) or toluene, which are undesirable for the industrial manufacturing. [6] Therefore, it is critical to develop novel green-solvent processable dopant-free HTMs towards efficient and stable PVSCs (Figure 1a), which however remains a major challenge. [7] This is because, to achieve high hole mobility, the HTMs usually should possess a large π-conjugated framework and suitable molecular dipoles to ensure strong intermolecular interactions, which inevitably compromises the solubility and film-forming ability in green solvents such as anisole, ethanol, 2-methylanisole (2MA), ethyl acetate, etc.…”