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Advanced Materials、深圳大学:(Zn,Ti)O电子传输层实现无镉Sb₂Se₃光阴极在稳定太阳能制氢中的最高转换效率

  • 2026-05-20 20:16:37
Advanced Materials、深圳大学:(Zn,Ti)O电子传输层实现无镉Sb₂Se₃光阴极在稳定太阳能制氢中的最高转换效率

题目

  • 英文(Zn,Ti)O Electron Transport Layer Enables the Highest Conversion Efficiency in Cd‑Free Sb₂Se₃ Photocathodes for Stable Solar Hydrogen Production

  • 中文: (Zn,Ti)O电子传输层实现无镉Sb₂Se₃光阴极在稳定太阳能制氢中的最高转换效率

来源

  • 期刊:Advanced Materials

  • 年份: 2026

  • 作者: Shuo Chen, Yong Chen, Hanhua Zhang, Muhammad Abbas, Donglou Ren, Yuexing Chen, Jingting Luo, Zhuanghao Zheng, Zhenghua Su, Guangxing Liang

  • 单位深圳大学物理与光电工程学院;广西大学资源环境与材料学院

研究背景

太阳能驱动的光电化学(PEC)水分解是一种高效的太阳能-氢能转换方式。Sb₂Se₃因其低毒性、低成本、优异光电特性成为有前景的光阴极材料,但现有高效Sb₂Se₃光阴极多使用CdS电子传输层,存在毒性、寄生光吸收和界面不稳定等问题。开发无镉、高性能的电子传输层是推动Sb₂Se₃基光阴极发展的关键。

研究内容

          本研究首次采用原子层沉积法制备(Zn,Ti)O作为无镉Sb₂Se₃光阴极的电子传输层。系统研究了Zn:Ti比例(如1:1和4:1)和退火温度(250°C、300°C、350°C)对器件性能的影响,优化后的Zn:Ti比例为4:1,退火温度为300°C。通过光电化学测试、光谱表征、电学分析和表面形貌观测等手段,揭示了(Zn,Ti)O层在提升载流子密度、优化能带对齐、增强界面电荷分离与传输效率以及改善器件稳定性方面的作用机制。

          主要图片

          图1:a: 三电极PEC测量示意图;b: W/A 1:1、W/A 4:1和W/O 4:1器件在暗态和斩波光照下的J-V曲线;c: W/A 4:1器件在pH=1、4、7电解质中的J-V曲线;d: 计算的HC-STH转换效率;e: W/A 4:1器件在不同pH下的HC-STH效率;f: 代表性W/A 4:1器件的氢气和氧气析出量-时间曲线及实物图;g: W/A 1:1、W/A 4:1和W/O 4:1器件在0 VRHE下的IPCE光谱及积分光电流密度;h: Sb₂Se₃-BiVO₄光阴极-光阳极串联电池在无外接电源下的实时产氢产氧实物图与示意图;i: 代表性光阴极(W/A 4:1)和光阳极(BiVO₄)的J-V曲线,交点代表串联电池的工作电流密度;j: 双电极系统中BiVO₄-Pt和BiVO₄-Sb₂Se₃的线性扫描伏安曲线;k: 冠军W/A 4:1光阴极和Sb₂Se₃-BiVO₄串联电池在不同pH条件下的长期光电流稳定性测试

          图2a: 器件的瞬态光电流衰减谱;b: W/A 1:1、W/A 4:1和W/O 4:1器件的吸收谱(上)与光捕获效率(下);c: 标准AM 1.5G太阳能光谱的能量密度通量及器件的积分光电流密度;d: 奈奎斯特图;e: 对应的波特图;f: (Zn,Ti)O薄膜的莫特-肖特基曲线;g: 电荷转移过程与对应能带对齐的示意图及等效电路

          图3a: Zn 2p XPS谱;b: Ti 2p XPS谱;c: O 1s XPS谱;d: 代表性薄膜的透射光谱;e: (αhν)²对光子能量的Tauc图;f: ETL与Sb₂Se₃吸收层的Ec、Ev和Eg示意图;g: W/A 1:1的能带对齐与载流子传输/复合行为示意图;h: W/A 4:1的能带对齐与载流子传输/复合行为示意图;i: W/O 4:1的能带对齐与载流子传输/复合行为示意图

          图4a-c: W/A 1:1、W/A 4:1和W/O 4:1薄膜的截面SEM图像;d-f: 薄膜表面接触角测量结果;g-i: 对应的三维AFM图像;j-l: 电化学活性面积测量结果

          图5a,b: W/A 1:1的KPFM表面形貌与接触电势差图像;e,f: W/A 4:1的KPFM表面形貌与接触电势差图像;i,j: W/O 4:1的KPFM表面形貌与接触电势差图像;c,g,k: 晶界附近的能带结构与CPD示意图;d,h,l: W/A 1:1、W/A 4:1和W/O 4:1的表面平均CPD分布

          图6a: 器件结构与测试装置示意图;b: 1/C²-V曲线;c: C-V与DLCP曲线;d: 并联电导G特性;e: 串联电阻R与理想因子A特性;f: 反向饱和电流密度J₀特性;g-i: C-f-T谱;j-l: 缺陷激活能与缺陷密度结果

          主要结论

                      1. 优化后的(Zn,Ti)O ETL(Zn:Ti = 4:1,300°C退火)显著提升了载流子密度,形成了“尖峰状”能带对齐,有效抑制了载流子复合。

                      2. 冠军器件在0 VRHE下实现了31.1 mA/cm²的光电流密度,半电池太阳能-氢转换效率达5.27%,为无镉Sb₂Se₃光阴极的最高纪录。

                      3. 在Sb₂Se₃-BiVO₄串联电池中,实现了2.50%的无偏置太阳能-氢转换效率。

                      4. (Zn,Ti)O ETL具有优异的耐腐蚀性,在酸性和中性溶液中均保持稳定。

                      5. 该研究为开发高效、环保的PEC光电电极提供了可行路径。

                      文章链接

                      https://doi.org/10.1002/adma.202518202

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                      115. /yingpanguazai/ssd/ssd1/www/c.460.net.cn/vendor/topthink/think-orm/src/db/concern/TimeFieldQuery.php ( 7.43 KB )
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                      122. /yingpanguazai/ssd/ssd1/www/c.460.net.cn/vendor/topthink/think-orm/src/db/concern/TableFieldInfo.php ( 2.63 KB )
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                      1. CONNECT:[ UseTime:0.000460s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
                      2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000691s ]
                      3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000330s ]
                      4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000310s ]
                      5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000478s ]
                      6. SELECT * FROM `set` [ RunTime:0.000196s ]
                      7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000579s ]
                      8. SELECT * FROM `article` WHERE `id` = 505583 LIMIT 1 [ RunTime:0.000481s ]
                      9. UPDATE `article` SET `lasttime` = 1779345735 WHERE `id` = 505583 [ RunTime:0.000743s ]
                      10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000221s ]
                      11. SELECT * FROM `article` WHERE `id` < 505583 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000432s ]
                      12. SELECT * FROM `article` WHERE `id` > 505583 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000405s ]
                      13. SELECT * FROM `article` WHERE `id` < 505583 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000619s ]
                      14. SELECT * FROM `article` WHERE `id` < 505583 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001602s ]
                      15. SELECT * FROM `article` WHERE `id` < 505583 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002346s ]
                      0.082155s