It is shown that ambipolar diffusion as a toy nonlinearity leads to very similar behaviour of large scale turbulent dynamos as full MHD. This is demonstrated using both direct simulations in a periodic box and a closure model for the magnetic correlation functions applicable to infinite space. Large scale fields develop via a nonlocal inverse cascade as described by the alpha-effect. However, b...

Organolead halide perovskites have attracted substantial attention because of their excellent physical properties, which enable them to serve as the active material in emerging hybrid solid-state solar cells. Here we investigate the phototransistors based on hybrid perovskite films and provide direct evidence for their superior carrier transport property with ambipolar characteristics. The fiel...

We study the photoluminescence from a near-surface quantum well in the regime of ambipolar tunneling to the surface states. Under steady-state excitation an electric field develops self-consistently due to the condition of equal tunneling currents for electrons and holes. The field induces a Stark shift of the photolumi-nescence signal which compares well with experimental data from near-surfac...

As high-performance organic semiconductors, π-conjugated polymers have attracted much attention due to their charming advantages including low-cost, solution processability, mechanical flexibility, and tunable optoelectronic properties. During the past several decades, great advances been made in polymers-based OFETs with p-type, n-type or even ambipolar characterics. Through chemical modificat...

Ambipolar diffusion likely plays a pivotal role in the formation and evolution of dense cores weakly-ionized molecular clouds. Linear analyses show that evolutionary times fragmentation scales are significantly greater than hydrodynamic (Jeans) values even for clouds with mildly supercritical mass-to-flux ratio. We utilize growth correspond to typical ionization fractions within cloud, apply co...