New perovskite solar cells: conversion 18. 1%

The good news! Perovskite solar cells in recently and the new progress of research. Overseas talent buffer base (nanjing university of technology Advanced materials research institute) Stevie hoang academician, professor Wang Jianpu team used 3 bromobenzene methylamine was prepared by high crystallinity and low defect of quasi two-dimensional perovskite membrane.

it is understood that the upper membrane is highly oriented growth of three-dimensional perovskite components, its smaller band gap and low exciton binding energy of the sun can realize low energy photons utilization and efficient charge separation. Film is the vertical growth of broadband gap at the bottom of the perovskite components, to achieve efficient charge transfer. 2% of the quasi 2 d perovskite solar cell. Unpackaged devices under 40% relative humidity of atmosphere environment aging 2400 hours, the efficiency is still keep 82% of the initial value.

and, more importantly, will not encapsulated device submerged in 60 seconds, almost no change of its parameters, show excellent water stability. 85%. In atmospheric environment, unpackaged devices under 200 mA cm - 2 large current density life 96 hours, refresh the perovskite light-emitting diodes (leds) on the stability of the world record.

the study showed that based on 3 bromobenzene methylamine quasi two-dimensional perovskite materials is expected to achieve efficient and stable perovskite photoelectric device, and precise control perovskite thin film growth is one of the key factors for achieving this goal.