Reverse polymer solar cell with dual electron transport layer structure

Abstract

The invention discloses a reverse polymer solar cell with a dual electron transport layer structure. In the cell, a layer of organic n type doped electron transport layer is introduced into the current most advanced reverse photovoltaic device structure (a cathode / electron take-out layer / light active layer / cavity collecting layer (transition metal oxide layer) / anode), and the reverse photovoltaic device structure is upgraded into a structure of a cathode / organic n type doped electron transport layer / electron take-out layer / light active layer / cavity collecting layer (transition metal oxide layer) / anode. Compared with a non-upgraded structure, the structure has the characteristics of low power consumption, high stability, high photogenerated electron collecting efficiency and high performance, and the defects of overhigh inner series connection resistance and low photogenerated electron collecting efficiency existing in the current reverse polymer solar cell can be overcome; and the structure plays a positive role in promoting the commercialization of the current polymer photovoltaic technology.

Description

technical field [0001] The technical solution of the invention relates to a solid device specially suitable for converting light energy into electric energy, specifically a reverse polymer solar cell with a double electron transport layer structure and a preparation method thereof. Background technique [0002] Energy issues are related to national security and are of great significance. Because organic polymer functional materials can be processed into films by solution printing, and have the advantages of flexibility, light weight, and low cost, organic polymer solar cells have become one of the research hotspots in renewable energy technology. At present, the highest power conversion efficiency (PCE) of polymer solar cells has reached 9-10%, basically meeting the commercial requirement of 10%. In order to further promote the development of polymer photovoltaic technology, it is necessary to make a detailed analysis of the working process, device structure and related mat...

AI Technical Summary

Problems solved by technology

The present invention is a reverse polymer solar cell with double electron transport layer structure to improve the collection efficiency of photogenerated electrons. An organic n-type doped electron transport layer is introduced into the hole collection layer (transition metal oxide layer) / anode), and the reverse photovoltaic device structure is upgraded to a cathode / organic n-type doped electron transport layer / electron extraction layer / Photoactive layer / hole collection layer (transition metal oxide layer) / anode, this structure has the characteristics of low power consumption, high stability, high photogenerated electron collection efficiency, and high performance compared with the upgraded one, and can overcome The shortcomings of the existing reverse polymer solar cells, such as high internal series resistance and low collection efficiency of photogenerated electrons, have positive significance for the commercialization of current polymer photovoltaic technology.

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