journal article·2019-09-18Open access

Interfacial Engineering for High-Efficiency Nanorod Array-Structured Perovskite Solar Cells

Bingbing Cao, Haoran Liu, Longkai Yang, Xin Li, Hu Liu, Pei Dong, Xianmin Mai, Chuanxin Hou, Ning Wang, Jiaoxia Zhang, Jincheng Fan, Qiang Gao, Zhanhu Guo

ACS Applied Materials & Interfaces· Volume 11· Issue 37

Abstract

TiO2 nanorod (NR) array for perovskite solar cells (PSCs) has attained great importance due to its superb power conversion efficiency (PCE) compared to that of the traditional mesoporous TiO2 film. A TiO2 compact layer for the growth of TiO2 NR array via spin-coating cannot meet the requirements for efficient NR-based PSCs. Herein, we have developed and demonstrated the insertion of a bifunctional extrathin TiO2 interlayer (5 nm) by atomic layer deposition (ALD) at the interface of the fluorine-doped tin oxide (FTO)/TiO2 compact layer to achieve alleviated electron exchange and a reduced energetic barrier. Thus, an accelerated extraction of electrons from TiO2 NR arrays via the compact layer and their transfer to the FTO substrate can improve the PSC efficiency. The thickness of the spin-coated TiO2 compact layer on the ALD-deposited TiO2 layer is spontaneously optimized. Finally, an outstanding efficiency of 20.28% has been achieved from a champion PSC with negligible hysteresis and high reliability. To the best of our knowledge, this is the first study demonstrating the superiority of TiO2-NR-based PSCs withstanding the dry heat and thermal cycling tests. The results are of great importance for the preparation of efficient and durable PSCs for real-world applications.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China

Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education; National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China

Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States

Department of Mechanical Engineering, George Mason University, Fairfax, Virginia 22030, United States

School of Urban Planning and Architecture, Southwest Minzu University, Chengdu 610041, China

School of Materials Science and Engineering, North University of China, Taiyuan 030051, China

State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China

School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China

College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, China

Scanning Probe Microscopy Group, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, Tennessee 37831, United States

Funding

Basic Energy Sciences · National Natural Science Foundation of China · Fujian Province · Qinghai Province

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