当前位置:首页>南昌>南昌大学陈义旺NE:26.91%!85°C MPPT运行1500 h保持95%!在α-FA-Cs钙钛矿太阳能电池中通过有机铯盐控制Cs的掺入!

南昌大学陈义旺NE:26.91%!85°C MPPT运行1500 h保持95%!在α-FA-Cs钙钛矿太阳能电池中通过有机铯盐控制Cs的掺入!

  • 2026-03-30 09:09:26
南昌大学陈义旺NE:26.91%!85°C MPPT运行1500 h保持95%!在α-FA-Cs钙钛矿太阳能电池中通过有机铯盐控制Cs的掺入!

文章介绍

甲脒铯金属卤化物钙钛矿(FA1-xCsxPbI3)的两步制造方法提供了对结晶调节的卓越控制,因此更适合太阳能电池制造。然而,由于Cs+掺入有限和相变机制不清楚,形成稳定器件所需的理想α相仍然具有挑战性。

基于此,南昌大学陈义旺等人设计了4-(二苯基膦基)苯甲酸铯,以实现有效的Cs+掺杂并使阳离子分布均匀化,从而获得具有改进相稳定性的高质量钙钛矿薄膜。因此,通过两步法制造的太阳能电池实现了26.91%的效率(认证为26.61%)。包含热稳定电荷传输层的器件在最大功率点跟踪和85°C下在1个太阳光照下连续运行1500小时后,保持了95%的初始效率(23.76%) (ISOS-L-2协议) 。本研究深入探讨了FA0.9Cs0.1PbI3的相变途径和相应的过渡态结构,以及Cs+驱动钙钛矿晶格稳定的机制。该论文近期以“Controlled Cs⁺ incorporation through organocaesium salts in α-FA–Cs perovskite solar cells with a certified efficiency of 26.61%”为题发表在顶级期刊Nature Energy上。

   图文信息   
图1 | 相变的动力学和热力学分析

图2 | 两步法DPPBCs有效掺杂Cs+的机理

图3 | 光浸泡条件下钙钛矿薄膜的稳定性

图4 | 器件性能和稳定性。

总之,作者阐明了FA0.9Cs0.1PbI3钙钛矿的相变途径和相应的结构变化。我们得出结论,Cs+通过锁定[PbI6]4−八面体和抑制FA+旋转来增强晶格稳定性和相变势垒。同时,通过在FA0.9Cs0.1PbI3的两步制备过程中引入DPPBC,成功抑制了δ-CsPbI3的产生,并有效地掺杂了Cs+。DPPBCs的引入降低了钙钛矿形成的反应焓,并促进了Cs+和FA+在钙钛矿薄膜中的均匀分布,从而提高了相稳定性。因此,经DPPBCs处理的太阳能电池实现了26.91%的PCE冠军,VOC为1.18 V和FF为86.11%。此外,在1倍太阳辐照、最大功率点跟踪和85°C(ISOS-L-2协议)的条件下连续运行1500小时后,带有热稳定电荷传输层的封装器件仍能保持其初始效率(23.76%)的95%。这些发现为FA–Cs钙钛矿的相分离/相变提供了见解,并为优化长期稳定的FA–Cs PVSC提供了科学指导

器件制备

器件结构:

ITO/SnO2/perovskite/Spiro-OMeTAD/Ag

1. SnO2纳米颗粒前驱体(SnO2胶体溶液/H2O2/去离子水,比例为1:1:2)通过4,000 rpm 30秒旋涂,150°C退火30分钟。

2. 以1,500 rpm的速度将PbI2、PbI2–CsI和PbI2-DPPBCs前驱体溶液旋涂到SnO2上35秒,然后在70°C下退火1分钟。随后,以2,000 rpm的速度将有机胺盐溶液旋涂到PbI2层的顶部30秒(手套箱的温度约为20–21°C)。空气环境中(相对湿度为30–40%,温度为20–21°C),并在160°C下退火20分钟。

3. 将MeO-PEAI(4 mg ml−1),以5,000 rpm 30秒旋涂。

4. Spiro-OMeTAD溶液以4,000 rpm 30秒旋涂。

5. 热蒸发100 nm的银。

文章信息

He, J., Guo, Z., Liu, K. et al. Controlled Cs⁺ incorporation through organocaesium salts in α-FA–Cs perovskite solar cells with a certified efficiency of 26.61%. Nat Energy (2026). https://doi.org/10.1038/s41560-026-02016-7

DOI:10.1038/s41560-026-02016-7

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  1. CONNECT:[ UseTime:0.000433s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000776s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000322s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000333s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000520s ]
  6. SELECT * FROM `set` [ RunTime:0.000220s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000535s ]
  8. SELECT * FROM `article` WHERE `id` = 492021 LIMIT 1 [ RunTime:0.000395s ]
  9. UPDATE `article` SET `lasttime` = 1774846239 WHERE `id` = 492021 [ RunTime:0.013310s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000244s ]
  11. SELECT * FROM `article` WHERE `id` < 492021 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000412s ]
  12. SELECT * FROM `article` WHERE `id` > 492021 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000498s ]
  13. SELECT * FROM `article` WHERE `id` < 492021 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000866s ]
  14. SELECT * FROM `article` WHERE `id` < 492021 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002600s ]
  15. SELECT * FROM `article` WHERE `id` < 492021 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002338s ]
0.096331s