PbTiO3修饰和极化处理提升钙钛矿太阳能电池性能

doi:10.15541/jim20240132

无机材料学报 ›› 2024, Vol. 39 ›› Issue (11): 1205-1211.DOI: 10.15541/jim20240132 CSTR: 32189.14.10.15541/jim20240132

所属专题：【能源环境】钙钛矿(202409)；【能源环境】太阳能电池(202409)

PbTiO₃修饰和极化处理提升钙钛矿太阳能电池性能

厉佥元¹(), 李纪伟¹, 张钰涵², 刘焱康¹, 孟阳¹, 储余¹, 朱一佳¹, 徐诺言¹, 朱亮¹, 张传香²(), 陶海军¹()

1.南京航空航天大学材料科学与技术学院, 南京 211106
2.南京工程学院材料科学与工程学院, 南京 211167

收稿日期:2024-03-20 修回日期:2024-05-29 出版日期:2024-11-20 网络出版日期:2024-07-15
通讯作者: 陶海军, 副教授. E-mail: taohaijun@nuaa.edu.cn;
张传香, 女, 教授. E-mail: zhangcxnuaa@njit.edu.cn
作者简介:厉佥元(1999-), 男, 硕士研究生. E-mail: liqianyuan@nuaa.edu.cn

Enhanced Photovoltaic Performance of Perovskite Solar Cells by PbTiO₃ Modification and Polarization Treatment

LI Qianyuan¹(), LI Jiwei¹, ZHANG Yuhan², LIU Yankang¹, MENG Yang¹, CHU Yu¹, ZHU Yijia¹, XU Nuoyan¹, ZHU Liang¹, ZHANG Chuanxiang²(), TAO Haijun¹()

1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
2. College of Material Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China

Received:2024-03-20 Revised:2024-05-29 Published:2024-11-20 Online:2024-07-15
Contact: TAO Haijun, associate professor. E-mail: taohaijun@nuaa.edu.cn;
ZHANG Chuanxiang, professor. E-mail: zhangcxnuaa@njit.edu.cn
About author:LI Qianyuan (1999-), male, Master candidate. E-mail: liqianyuan@nuaa.edu.cn

摘要/Abstract

摘要：

碳基钙钛矿太阳能电池(C-PSCs)具有高光电转换效率(PCE)、长期稳定、低成本优势, 有助于实现钙钛矿太阳能电池(PSCs)商业化。本工作在TiO₂致密电子传输层(c-TiO₂)上原位生成PbTiO₃, 研究了PbTiO₃修饰和极化处理对C-PSCs光伏性能的促进作用。研究发现, 反应30 s制备的PbTiO₃不仅能够有效地抑制电子传输层的电阻增长, 而且将界面处载流子积聚下降至29.7%, 大幅度提升了载流子分离能力。此外, 进一步极化处理c-TiO₂/PbTiO₃层可以将载流子积聚下降至6.78%, 使得PSCs的开路电压(V_oc)达到0.93 V, 短路电流密度(J_sc)达到14.83 mA/cm², 填充因子(FF)达到51.16%, PCE达到7.11%。本工作系统研究了PbTiO₃修饰和极化处理的方法, 提出了改善C-PSCs性能的研究策略, 揭示了优化载流子传输性能的内在机制, 为开发高效率、低成本和长寿命的商业化PSCs提供了经验借鉴。

关键词: 钙钛矿太阳能电池, 电子传输层, 铁电修饰, 极化处理

Abstract:

Carbon-based perovskite solar cells (C-PSCs) have attracted significant interest for their advantages of high photoelectric conversion efficiency (PCE), long-term stability and low cost, showing superiority in commercialization of perovskite solar cells (PSCs). However, the promoting effect of PbTiO₃ modification and polarization treatment on C-PSCs photovoltaic performance by in-situ generation of PbTiO₃ on a dense electron transport layer of TiO₂ (c-TiO₂) is still unknow.. It was found that the PbTiO₃ formed after reaction for 30 s could effectively restrict the sharp increase in resistance of the electron transport layer, and substantially reduced the carrier accumulation at the interface to 29.7%, greatly improving the carrier separation ability. In addition, the carrier accumulation was further reduced to 6.78% through polarizing the c-TiO₂/PbTiO₃ layer, so that PSCs displayed 0.93 V of open circuit voltage (V_oc), 14.83 mA/cm² of short circuit current density (J_sc), 51.16% of fill factor (FF), and 7.11% of PCE. This work comprehensively reports the methods of PbTiO₃ modification and polarization treatment, proposes a research strategy to improve the performance of C-PSCs, reveals the intrinsic mechanism for optimizing carrier transport performance, and provides a way for developing high-efficiency, low-cost and long-life commercial PSCs.

Key words: perovskite solar cell, electron transport layer, ferroelectric modification, polarization treatment

中图分类号:

TN336

厉佥元, 李纪伟, 张钰涵, 刘焱康, 孟阳, 储余, 朱一佳, 徐诺言, 朱亮, 张传香, 陶海军. PbTiO₃修饰和极化处理提升钙钛矿太阳能电池性能[J]. 无机材料学报, 2024, 39(11): 1205-1211.

LI Qianyuan, LI Jiwei, ZHANG Yuhan, LIU Yankang, MENG Yang, CHU Yu, ZHU Yijia, XU Nuoyan, ZHU Liang, ZHANG Chuanxiang, TAO Haijun. Enhanced Photovoltaic Performance of Perovskite Solar Cells by PbTiO₃ Modification and Polarization Treatment[J]. Journal of Inorganic Materials, 2024, 39(11): 1205-1211.

图/表 11

图1 c-TiO2/PbTiO3层制备流程示意图

Fig. 1 Preparative diagram of c-TiO2/PbTiO3 layer

图2 c-TiO2/PbTiO3表面的(a)SEM照片和(b~d)对应的EDS元素面扫描图

Fig. 2 (a) SEM image and (b-d) EDS elemental mappings of c-TiO2/PbTiO3 surface

图3 c-TiO2与c-TiO2/PbTiO3层的XPS谱图

Fig. 3 XPS spectra of c-TiO2 and c-TiO2/PbTiO3 layer (a) Full; (b) Pb4f; (c) Ti2p; (d) O1s

图4 不同反应时间下c-TiO2/PbTiO3层的(a)紫外-可见光透过率谱图和(b)暗态伏安曲线

Fig. 4 (a) UV-visible transmittance spectra and (b) I-V curves under dark state of c-TiO2/PbTiO3 layers with different reaction time Colorful figures are available on website

表1 不同反应时间下c-TiO2/PbTiO3层的电导率

Table 1 Conductivities of c-TiO2/PbTiO3 layers with different reaction time

Reaction time/s	R/Ω	ρ/(Ω·cm)	σ/(mS·cm^-1)
0	22.61	5.65×10⁵	1.77×10^-3
10	23.64	5.91×10⁵	1.69×10^-3
30	24.89	6.22×10⁵	1.61×10^-3
120	28.98	7.24×10⁵	1.38×10^-3
300	55.20	13.79×10⁵	7.25×10^-4

图5 基于不同反应时间c-TiO2/PbTiO3层的PSCs的J-V曲线

Fig. 5 J-V curves of PSCs prepared by c-TiO2/PbTiO3 layers with different reaction time

表2 基于不同反应时间c-TiO2/PbTiO3层的PSCs光伏参数

Table 2 Photovoltaic parameters of PSCs prepared by c-TiO2/PbTiO3 layers with different reaction time

Reaction time/s	V_oc/V	J_sc/(mA·cm^-2)	FF/%	PCE/%
0	0.88	13.84	51.51	6.26
10	0.88	13.92	51.55	6.31
30	0.89	14.12	51.77	6.49
120	0.93	11.99	52.56	5.88
300	0.94	9.81	42.00	3.85

图6 基于不同电压极化c-TiO2/PbTiO3层的PSCs的J-V曲线

Fig. 6 J-V curves of PSCs prepared by c-TiO2/PbTiO3 layers after polarization with different voltages

表3 基于不同电压极化c-TiO2/PbTiO3层的PSCs光伏参数

Table 3 Photovoltaic parameters of PSCs prepared by c-TiO2/PbTiO3 layers after polarization with different voltages

Polarization voltage/V	V_oc/V	J_sc/(mA·cm^-2)	FF/%	PCE/%
0	0.88	14.12	51.18	6.41
20	0.89	14.39	51.25	6.53
40	0.93	14.83	51.16	7.11
50	0.93	14.95	51.35	7.11
60	0.93	15.00	51.20	7.12

图7 c-TiO2与c-TiO2/PbTiO3层的Mott-Schottky曲线

Fig. 7 Mott-Schottky curves of c-TiO2 and c-TiO2/PbTiO3 layers (a) Primitive state; (b) ±40 V polarization treatment; (c) ±60 V polarization treatment; (d) Carrier concentrations

图8 c-TiO2、c-TiO2/PbTiO3层和c-TiO2/PbTiO3层极化处理后的(a)Nyquist图谱、(b)不同偏压下的复合阻抗图、(c)电压衰减曲线、(d)暗电流曲线、(e)电容-频率曲线和(f)稳态光电流输出曲线

Fig. 8 (a) Nyquist plots, (b) composite impedance plots at different bias voltages, (c) voltage attenuation curves, (d) dark current curves, (e) capacitance-frequency curves, and (f) photocurrent output curves of c-TiO2, c-TiO2/PbTiO3 and polarization-treated c-TiO2/PbTiO3 layers

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PbTiO₃修饰和极化处理提升钙钛矿太阳能电池性能

Enhanced Photovoltaic Performance of Perovskite Solar Cells by PbTiO₃ Modification and Polarization Treatment

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