Effect of Sputtered NiOx Modified by Self-Assembled Layer on Performance of Blade-Coated Wide-Bandgap Perovskite Solar Cells

Abstract

Abstract: As a common inorganic hole transport layer material in high efficiency perovskite solar cells, nickel oxide (NiO_x) has good optical transmission and chemical stability, and can also be prepared by magnetron sputtering and other scalable manufacturing methods at low cost. However, compared to organic hole transport materials, the energy level mismatch, defects, and adverse chemical reactions at the NiO_x/perovskite interface deteriorate the performance of NiO_x-based wide-bandgap perovskite solar cells (PSCs). To address these issues simultaneously, a self-assembled layer of (2-(9H-carbazol-9-yl) ethylphosphonic acid (2PACz) was proposed as NiO_x/wide-bandgap perovskite interface modification material. This molecule can passivate NiO_x surface traps, optimize the film formation of the upper perovskite layer and facilitate charge transport. Consequently, the power conversion efficiency (PCE) of wide-bandgap PSCs increase from 16.18% to 18.42%. This work provides a reference strategy for the application of NiO_x hole transport layer in wide-bandgap PSCs.

Key words: wide-bandgap perovskite solar cell, hole transport layer, nickel oxide, self-assembled layer, magnetron sputtering, blade-coating method

CLC Number:

TM914.4

LI Jianing, GE Xin, HUANG Zixuan, LIU Zhen, WANG Pengyang, SHI Biao, ZHAO Ying, ZHANG Xiaodan. Effect of Sputtered NiO_x Modified by Self-Assembled Layer on Performance of Blade-Coated Wide-Bandgap Perovskite Solar Cells[J]. Journal of Synthetic Crystals, 2023, 52(8): 1458-1466.

References

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Effect of Sputtered NiO_x Modified by Self-Assembled Layer on Performance of Blade-Coated Wide-Bandgap Perovskite Solar Cells

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