Copper Solves Hysteresis Problem
Copper Solves Hysteresis Problem
  • Reporter Kim Su-min
  • 승인 2017.11.01 14:29
  • 댓글 0
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The hysteresis is the delay that tap water runs a little late when we turn the faucet and the water still falls after we lock it. When this phenomenon occurs in the solar cell, the efficiency is lowered. Kim Tae-wan (CE, Ph.D. Integrated), Mahdi Malekshahi Byranvand (CE, Post Doc.), and Professor Park Tai-ho (CE) solved this problem and improved the efficiency by a single process called cuprous iodide (CuI) coating. They coated titanium oxide, an electron transfer layer used for flat perovskite solar cells, with cuprous iodide. A simple one-step spin coating method increases the energy level and moves electrons faster due to cuprous iodide’s property of attracting electrons. Particularly, cuprous iodide lowers the recombination and enhances the efficiency of electron extraction.

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