Improvement of electron/hole injection balance based on nanowire/nanocube hybrid perovskite

The methyl ammonium lead iodide perovskite nanowire/nanocube can be fabricated with an improved two-step spin-coating process by adjusting the amount of dimethyl formamide. The hybrid structure enhanced the efficiency of electron/hole separation and charge transfer at the electron transport layer/perovskite/hole transport layer interfaces, benefiting from the improvement of electron/hole injection balance. The dynamic time parameters based on the half-baked cells, only containing electron transport layer or the hole transport layer, could assert rationality of the hypothesis by photoluminescence decays. •The nanowire/nanocube perovskite was fabricated by an improved two-step spin-coating process.•The hybrid structure can enhance the electron/hole separation, charge transfer and light absorption.•The improvement of electron/hole injection balance can help to promote the photocurrent of pervoskite solar cells.