Scholarlink

<p>Robust hole-selective interfaces are critical for the stability of perovskite solar cells, yet this requirement is inadequately addressed by self-assembled monolayers (SAMs). Here we combine (4-(7<i>H</i>-dibenzo[<i>c</i>,<i>g</i>]carbazol-7-yl)butyl)phosphonic acid (CbzNaph) and its hydroxyl functionalized analogue (CbzNaphOH), which features intramolecular hydrogen-bonding interactions between the spacer and anchoring groups, to modulate SAM molecular packing. Increased steric hindrance promotes the formation of an amorphous self-assembled multilayer (a-SAMUL) with homogeneous packing. This amorphous layer acts simultaneously as a uniform, strongly adhesive binding medium that tightly couples the perovskite and substrate—thereby suppressing the formation of mobile ions—and as an efficient hole-selective contact with favourable energy-level alignment. Devices incorporating a-SAMULs achieve a certified efficiency exceeding 26% and reduced ion-migration-driven degradation. The devices exhibit reverse breakdown voltages exceeding −17 V and maintain operational stability for over 3,000 h with negligible degradation. These findings underscore the effectiveness of a-SAMULs in enhancing the long-term reliability of perovskite photovoltaics.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Amorphous self-assembled multilayers for perovskite solar cells with improved reverse bias stability

  • 期刊论文

  • 发表日期：

    2026年3月20日

查看全文
  • Qifan Feng,
  • Kai-Kai Liu,
  • Deng Wang,
  • Songyang Yuan,
  • Zhenhuang Su,
  • Zhaoyu Lou,
  • Ziwei Liu,
  • Nikhil Kalasariya,
  • Wenlin Jiang,
  • Xin Wu,
  • Shuo Zhang,
  • Binghui Wu,
  • Zonglong Zhu,
  • Xiaofeng Huang,
  • Alex K.-Y. Jen,
  • Martin Stolterfoht

摘要

Robust hole-selective interfaces are critical for the stability of perovskite solar cells, yet this requirement is inadequately addressed by self-assembled monolayers (SAMs). Here we combine (4-(7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (CbzNaph) and its hydroxyl functionalized analogue (CbzNaphOH), which features intramolecular hydrogen-bonding interactions between the spacer and anchoring groups, to modulate SAM molecular packing. Increased steric hindrance promotes the formation of an amorphous self-assembled multilayer (a-SAMUL) with homogeneous packing. This amorphous layer acts simultaneously as a uniform, strongly adhesive binding medium that tightly couples the perovskite and substrate—thereby suppressing the formation of mobile ions—and as an efficient hole-selective contact with favourable energy-level alignment. Devices incorporating a-SAMULs achieve a certified efficiency exceeding 26% and reduced ion-migration-driven degradation. The devices exhibit reverse breakdown voltages exceeding −17 V and maintain operational stability for over 3,000 h with negligible degradation. These findings underscore the effectiveness of a-SAMULs in enhancing the long-term reliability of perovskite photovoltaics.