  Perovskite light-emitting diodes (PeLEDs) have recently attracted great
research luminescence at room temperature in interest for their narrow
emissions and solution processability. Remarkable progress has been achieved
PeLEDs in recent years. Here we present the new configuration of ambipolar
transparent perovskite light emitting device. The combination of voltage
induced p-i-n formation and ionically doped carbon electrodes and allows
electroluminescence in forward and reverse bias. Here we present easy-to-do
transparent ambipolar light emitting subpixel based on inorganic perovskite and
single wall carbon nanotubes. For this experiment PeLEDs were assembled using a
glass substrate with ITO stripes as bottom electrode; spin-coated
CsPbBr3/I3:PEO composite as emissive layer; single wall carbon nanotubes
deposited by a simple press transfer process at room temperature. We
demonstrate a concept of stacked multicolor tandem pixel. Stack of transparent
light emitting units might allow fine color tuning in parallel tandem
connection without segregation compared to mixed halide perovskites. This
configuration conforms pixel downsizing and make to fabrication of emissive
multijunction pixels in a stack.
