L-精氨酸掺杂钙钛矿太阳电池性能研究

doi:10.15541/jim20210421

无机材料学报 ›› 2022, Vol. 37 ›› Issue (6): 669-675.DOI: 10.15541/jim20210421 CSTR: 32189.14.10.15541/jim20210421

L-精氨酸掺杂钙钛矿太阳电池性能研究

焦博新(), 刘兴翀(), 全子威, 彭永姗, 周若男, 李海敏

西南石油大学新能源与材料学院, 成都 610500

收稿日期:2021-07-05 修回日期:2021-09-18 出版日期:2022-06-20 网络出版日期:2021-09-27
通讯作者: 刘兴翀, 副教授. E-mail: Liuxc_76@163.com
作者简介:焦博新(1999-), 男, 硕士研究生. E-mail: jiaoboxin21@mails.ucas.ac.cn
基金资助:
四川省科技计划应用基础项目(2021YJ0069);西南石油大学青年创新团队项目(2019CXTD04);西南石油大学启航项目(2019QHZ013)

Performance of Perovskite solar cells Doped with L-arginine

JIAO Boxin(), LIU Xingchong(), QUAN Ziwei, PENG Yongshan, ZHOU Ruonan, LI Haimin

School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China

Received:2021-07-05 Revised:2021-09-18 Published:2022-06-20 Online:2021-09-27
Contact: LIU Xingchong, associate professor. E-mail: Liuxc_76@163.com
About author:JIAO Boxin (1999–), male, Master candidate. E-mail: jiaoboxin21@mails.ucas.ac.cn
Supported by:
Application Foundation Project of Science and Technology of Sichuan Province(2021YJ0069);Youth Science and Technology Innovation Team Project of SWPU(2019CXTD04);Scientific Research Starting Project of SWPU(2019QHZ013)

摘要/Abstract

摘要：

钙钛矿太阳电池以其优异的性能和发展潜力而成为新能源领域研究热点, 但仍然存在缺陷密度大、稳定性差等不足。本研究通过实验对比多种常见氨基酸的掺杂效果后, 将小分子有机物L-精氨酸引入钙钛矿前驱体溶液, 并通过二元两步法制备钙钛矿太阳电池。L-精氨酸掺杂提升了器件的光电性能, 光电效率由18.81%提升到21.86%。L-精氨酸通过降低钙钛矿层缺陷密度(由4.83×10¹⁶ cm^-3降低到3.45×10¹⁶ cm^-3), 减少了载流子非辐射复合, 延长了载流子的平均寿命, 且钙钛矿晶粒尺寸增大、晶界减少、薄膜吸光能力增强且稳定性提升, 迟滞效应得到抑制。这是由于L-精氨酸的多种基团与钙钛矿材料作用钝化了缺陷造成的。本研究为钙钛矿太阳电池的性能优化提供了一种借鉴方法。

关键词: 钙钛矿太阳电池, 缺陷钝化, L-精氨酸, 掺杂改性

Abstract:

Perovskite solar cells have become a research hotspot in the field of new energy due to the excellent performance and potential in application, but it still displays some disadvantages such as high defect density and poor stability. In this study, L-arginine, a small molecule of organic matter, was doped into the perovskite precursor soLution as compared with the other amino acids, and the perovskite solar cells were prepared by a two-element and two-step preparation method. The test results show that L-arginine doping improves the photoelectric performance of the device, which photoelectric efficiency increases from 18.81% to 21.86%. L-arginine reduces the nonradiative recombination of carriers and increases the average carrier life by reducing the defect density of perovskite layer from 4.83×10¹⁶ cm^-3 to 3.45×10¹⁶ cm^-3. In addition, the perovskite grain size increases, grain boundaries decrease, the light absorption ability and stability of the film are enhanced, while the hysteresis effect is suppressed. Improvement of the photovoltaic performance is due to the passivation of defects by interaction between multi-groups of L-arginine and perovskite materials. This study provides an optimization method for perovskite solar cells.

Key words: perovskite solar cell, defect passivation, L-arginine, doping modification

中图分类号:

TM914

焦博新, 刘兴翀, 全子威, 彭永姗, 周若男, 李海敏. L-精氨酸掺杂钙钛矿太阳电池性能研究[J]. 无机材料学报, 2022, 37(6): 669-675.

JIAO Boxin, LIU Xingchong, QUAN Ziwei, PENG Yongshan, ZHOU Ruonan, LI Haimin. Performance of Perovskite solar cells Doped with L-arginine[J]. Journal of Inorganic Materials, 2022, 37(6): 669-675.

图/表 11

图1 (a)L-精氨酸的分子结构式和(b)n-i-p型PSCs的器件结构

Fig. 1 (a) MolecuLar structure of L-arginine and (b) n-i-p type device structure

图S1 氨基酸掺杂物的分子结构

Fig. S1 Molecular structure of amino acid dopants

图S2 (a)PbI型缺陷的俯视图和(b)掺杂不同氨基酸的PSCs的PCE箱式分布

Fig. S2 (a) Top view of PbI type defects and (b) PCE box distributions of PSCs doped with different amino acids

图2 (a, c)未掺杂和(b, d)掺杂L-精氨酸的钙钛矿薄膜的(a, b)SEM照片和(c, d)AFM图

Fig. 2 (a, b) Typical SEM images and (c, d) AFM images of perovskite films (a, c) without and (b, d) with L-arginine doping

图3 掺杂与未掺杂L-精氨酸的PSCs的(a)XRD图谱、(b)UV-Vis图谱、(c)FT-IR图谱和(d)FT-IR图谱的局部放大图

Fig. 3 (a) XRD patterns, (b) UV-Vis spectra, (c) FT-IR spectra, and (d) local amplification of (c) for undoped and doped perovskite films without and with L-arginine doping Colorful figures are available on website

图4 未掺杂与掺杂L-精氨酸的钙钛矿薄膜的(a)PL图谱(b) TRPL图谱和拟合结果

Fig. 4 (a) PL spectra, (b) TRPL spectra and fitting resuLts of perovskite films with and without L-arginine doping Colorful figures are available on website

图5 未掺杂与掺杂L-精氨酸的钙钛矿太阳电池的(a)PCE箱式/正态分布、(b)J-V曲线、(c)IPCE及积分电流密度曲线和(d)正/反向扫描迟滞曲线

Fig. 5 (a) PCE box/normal distribution, (b) J-V curves, (c) IPCE and integral current density curves, and (d) forward and reverse scan J-V curves of PSCs with and without L-arginine doping Colorful figures are available on website

表1 不同L-精氨酸掺杂浓度的PSCs器件的光电性能参数

Table 1 Photoelectric parameters of PSCs doped with different concentrations of L-arginine

Concentration/ (mg·L^-1)	J_SC/(mA·cm^-2)	V_OC/V	FF/%	PCE/%
0	21.80	1.119	77.1	18.81
40	22.20	1.121	77.0	19.15
60	22.55	1.131	78.6	20.03
80	23.68	1.143	80.8	21.86
100	22.74	1.131	79.4	20.42

图6 (a)未掺杂与(b)掺杂L-精氨酸PSCs的SCLC曲线, 未掺杂与掺杂L-精氨酸PSCs的(c)EIS阻抗谱图和(d)暗态J-V曲线

Fig. 6 SCLC curve of PSCs (a) undoped and (b) doped with L-arginine, (c) EIS impedance spectra and (d) dark J-V curves of PSCs with and without L-arginine doping PC61 BM: [6,6]-phenyl-C61-butyric acid methyl ester

图S3 不同氨基酸掺杂钙钛矿薄膜的(a)XRD图谱和(b)EIS阻抗谱

Fig. S3 (a)XRD patterns and (b)EIS impedance spectra of perovskite films doped with different amino acids

图7 未掺杂与掺杂L-精氨酸钙钛矿太阳电池的(a)400 s电流及电压稳定性测试, (b)480 h器件稳定性测试

Fig. 7 (a) Current and voltage stability tests for 400 s, and (b) device stability tests for 480 h of PSCs with and without L-arginine doping

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L-精氨酸掺杂钙钛矿太阳电池性能研究

Performance of Perovskite solar cells Doped with L-arginine

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