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南昌大学Sci. Adv:均匀化面外应变分布实现高性能柔性钙钛矿光伏器件

  • 2026-04-16 05:18:59
南昌大学Sci. Adv:均匀化面外应变分布实现高性能柔性钙钛矿光伏器件

【DT钙钛矿】获悉,Science Advances4月10日在线发表南昌大学谈利承和陈义旺等人Homogenizing out-of-plane strain distribution for high-performance flexible perovskite photovoltaics(均匀化面外应变分布实现高性能柔性钙钛矿光伏器件最新研究成果。

柔性钙钛矿太阳能电池(PVSCs)因其轻质和柔韧性,成为下一代光伏技术的有力候选者近年来,A位阳离子工程与界面工程在缓解晶格应变、提升器件性能方面展现出良好潜力。然而,由非均匀A位掺杂引起的面外应变不均匀性以及富PbI₂表面产生的残余应力,限制了其长期稳定性和机械可靠性。
本文中,研究人员证明优化A位掺杂可以降低缺陷密度和微应变,提高组分均匀性。利用截面峰值力定量纳米力学图谱(PF‑QNM)技术,作者实现了钙钛矿层内杨氏模量梯度的直接可视化与定量表征,进而阐明了应变均质化的调控路径。通过引入一种二铵盐间隔基团,在富PbI₂表面原位生成垂直取向的二维钙钛矿中间层,有效释放富PbI₂表面产生的残余应力,促进界面载流子传输,并增强钙钛矿薄膜的机械性能。
最终,基于上述策略,在刚性和柔性PVSCs上分别实现了26.59%和25.88%(认证25.55%)的光电转换效率。此外,大面积柔性组件在25平方厘米和100平方厘米面积上分别获得了21.77%和19.23%的优异效率。未封装的柔性器件在2000小时最大功率点跟踪(ISOS-L-1)后仍保持初始效率的97.8%,同时在湿热、热循环和机械测试中表现出卓越的耐久性。这项工作为推进柔性PVSCs的商业化提供了关键基础
研究亮点:
  1. 面外应变均匀化策略:通过优化A位阳离子(引入MDA²⁺)掺杂,显著降低了缺陷密度和微应变,实现了钙钛矿薄膜中面外应变的均匀分布。PF-QNM纳米力学成像首次直观揭示了应变均匀化路径,杨氏模量梯度从2.34 GPa降至1.34 GPa。

  2. 原位二维应力释放层:利用含氧二铵盐(EDOEA)与表面残余PbI₂原位反应,形成垂直取向的二维钙钛矿覆盖层,有效释放残余拉伸应力(转变为均匀压缩应变),同时增强界面载流子传输和机械韧性,使界面断裂能大幅提升。

  3. 创纪录效率与超长稳定性:柔性器件实现25.88%(认证25.55%)的效率,25 cm²组件效率达21.77%,100 cm²组件达19.23%。未封装器件在2000小时MPP跟踪后保持97.8%初始效率;在-40°C至85°C热循环500次后保持92.1%;在11,000次极端弯曲(半径4 mm)后仍保持90%以上效率,均为目前报道的最高水平之一。

附:

图1 混合阳离子钙钛矿薄膜中的应变工程与缺陷抑制

图2应力缓释型二维钙钛矿层的制备与表征

图3 柔性钙钛矿太阳能电池的光伏性能与稳定性

图4 柔性钙钛矿太阳能电池的力学稳定性

论文信息

Yang Zhong et al. ,Homogenizing out-of-plane strain distribution for high-performance flexible perovskite photovoltaics.Sci. Adv.12,eaec3238(2026).DOI:10.1126/sciadv.aec3238

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  1. CONNECT:[ UseTime:0.001163s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001651s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000734s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000678s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001315s ]
  6. SELECT * FROM `set` [ RunTime:0.000617s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001406s ]
  8. SELECT * FROM `article` WHERE `id` = 498660 LIMIT 1 [ RunTime:0.001856s ]
  9. UPDATE `article` SET `lasttime` = 1776629528 WHERE `id` = 498660 [ RunTime:0.014833s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000618s ]
  11. SELECT * FROM `article` WHERE `id` < 498660 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001046s ]
  12. SELECT * FROM `article` WHERE `id` > 498660 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001072s ]
  13. SELECT * FROM `article` WHERE `id` < 498660 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001693s ]
  14. SELECT * FROM `article` WHERE `id` < 498660 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.006297s ]
  15. SELECT * FROM `article` WHERE `id` < 498660 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.014378s ]
0.143028s