Perovskite/crystalline silicon laminated solar cell based on double tunneling compound

Abstract

The invention discloses a perovskite / crystalline silicon laminated solar cell based on a double tunneling compound. The perovskite / crystalline silicon laminated solar cell comprises a grid line, an antireflection layer, a first transparent conductive oxide, n-type microcrystalline silicon or amorphous silicon (p-type microcrystalline silicon or amorphous silicon), a first tunneling compound, a N or P-type monocrystalline silicon wafer, a second tunneling compound, p-type microcrystalline silicon or amorphous silicon (n-type microcrystalline silicon or amorphous silicon), a second transparent conductive oxide, an electron transport layer (hole transport layer), a perovskite light absorption layer, a hole transport layer (electron transport layer), a third transparent conductive oxide, an antireflection layer and a grid line. According to the invention, tunneling compound selective contact is directly formed on the two faces of a N-type or P-type monocrystalline silicon wafer, so that the passivation effect is remarkable, the process is simple, and the cost is low; and the crystalline silicon bottom cell based on the double tunneling compound and the perovskite top cell can easily realize better current matching, interface charge transmission is smoother, and high conversion efficiency and high stability are realized at the same time.

Description

technical field [0001] The invention relates to a solar cell, in particular to a perovskite / crystalline silicon laminated solar cell based on a double tunneling compound. Background technique [0002] Global fossil resources are increasingly depleted, and solar energy is an ideal alternative due to its green and renewable nature. One of the most important utilization methods of solar energy is photovoltaic power generation technology, which directly converts solar energy into electrical energy. Improving solar cell efficiency is one of the keys to reducing the cost of photovoltaic power generation while improving its competitiveness with conventional power sources. The most direct way to improve is to fabricate multi-junction tandem solar cells composed of multiple absorbing layers with complementary band gaps. The tandem cell concept has been widely used, ranging from relatively low-cost hydrogenated amorphous silicon (a-Si:H) to the highest performance III-V component ma...

AI Technical Summary

Problems solved by technology

a-Si:H has a high absorption coefficient and is considered to be an excellent candidate for low-cost photovoltaics, but the unavoidable Staebler-Wronski effect limits its long-term photostability, leading to the creation of deep-site defect recombination centers

Although the power conversion efficiency of III-V multi-junction solar cells has exceeded 30%, the complex and expensive fabrication process limits their widespread application to space photovoltaics or concentrated photovoltaics

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