Efficacious engineering on charge extraction for realizing highly efficient perovskite solar cells,Energy & Environmental Science

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Efficacious engineering on charge extraction for realizing highly efficient perovskite solar cells
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2017-11-13 00:00:00 , DOI: 10.1039/c7ee02685d
Shizhong Yue _{1,

2,

3,

4,

5} , Kong Liu _{1,

2,

3,

4,

5} , Rui Xu _{6,

7,

8,

9} , Meicheng Li _{5,

10,

11,

12} , Muhammad Azam _{1,

2,

3,

4,

5} , Kuankuan Ren _{1,

2,

3,

4,

5} , Jun Liu _{1,

2,

3,

4,

5} , Yang Sun _{1,

2,

3,

4,

5} , Zhijie Wang _{1,

2,

3,

4,

5} , Dawei Cao _{12,

13,

14,

15,

16} , Xiaohong Yan _{12,

13,

14,

15,

16} , Shengchun Qu _{1,

2,

3,

4,

5} , Yong Lei _{6,

7,

8,

9} , Zhanguo Wang _{1,

2,

3,

4,

5}

Affiliation

Key Laboratory of Semiconductor Materials Science
Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices
Institute of Semiconductors
Chinese Academy of Sciences
Beijing
Institut für Physik & IMN MacroNano® (ZIK)
Technische Universität Ilmenau
98693 Ilmenau
Germany
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
North China Electric Power University
China
Department of Physics
Faculty of Science
Jiangsu University
Zhenjiang 212013

Efficient extraction of photogenerated charge carriers is of significance for acquiring a high efficiency for perovskite solar cells. In this paper, a systematic strategy for effectively engineering the charge extraction in inverted structured perovskite solar cells based on methylammonium lead halide perovskite (CH₃NH₃PbI_3−xCl_x) is presented. Intentionally doping the chlorine element into the perovskite structure is helpful for obtaining a high open circuit voltage. The engineering is carried out by modifying the aluminium cathode with zirconium acetylacetonate, doping the hole transport layer of nickel oxide (NiO_x) with copper and using an advanced fluorine doped tin oxide (FTO) substrate. This improves the bandgap alignment of the whole device, and thus, is of great benefit for extracting the charge carriers by promoting the transport rate and reducing the trap states. Consequently, an optimized power conversion efficiency of 20.5% is realized. Insights into how to extract charge carriers efficiently with a minimum energy loss are discussed.

中文翻译：

高效的电荷提取工程，可实现高效钙钛矿太阳能电池

光生载流子的有效提取对于获得钙钛矿型太阳能电池的高效率具有重要意义。本文提出了一种有效地工程化基于甲基铵卤化钙钛矿（CH ₃ NH ₃ PbI _{3− x} Cl _x）的结构化钙钛矿太阳能电池中电荷提取的系统策略。故意将氯元素掺杂到钙钛矿结构中有助于获得高的开路电压。通过用乙酰丙酮锆修饰铝阴极，掺杂氧化镍（NiO _x）和铜，并使用高级的氟掺杂氧化锡（FTO）衬底。这改善了整个器件的带隙对准，因此，通过提高传输速率和减少陷阱状态，对于提取电荷载流子具有很大的好处。因此，实现了20.5％的优化功率转换效率。讨论了如何以最小的能量损耗有效地提取电荷载流子的见解。

更新日期：2017-11-22

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