title: The Light-Induced Field-Effect Solar Cell Concept - Perovskite Nanoparticle Coating Introduces Polarization Enhancing Silicon Cell Efficiency.
abstract: Solar cell generates electrical energy from light one via pulling excited carrier away under built-in asymmetry. Doped semiconductor with antireflection layer is general strategy to achieve this including crystalline silicon (c-Si) solar cell. However, loss of extra energy beyond band gap and light reflection in particular wavelength range is known to hinder the efficiency of c-Si cell. Here, it is found that part of short wavelength sunlight can be converted into polarization electrical field, which strengthens asymmetry in organic-c-Si heterojunction solar cell through molecule alignment process. The light harvested by organometal trihalide perovskite nanoparticles (NPs) induces molecular alignment on a conducting polymer, which generates positive electrical surface field. Furthermore, a "field-effect solar cell" is successfully developed and implemented by combining perovskite NPs with organic/c-Si heterojunction associating with light-induced molecule alignment, which achieves an efficiency of 14.3%. In comparison, the device with the analogous structure without perovskite NPs only exhibits an efficiency of 12.7%. This finding provides a novel concept to design solar cell by sacrificing part of sunlight to provide "extra" asymmetrical field continuously as to drive photogenerated carrier toward respective contacts under direct sunlight. Moreover, it also points out a method to combine promising perovskite material with c-Si solar cell.
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China.
authors.forename: Yusheng
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China.
authors.forename: Zhouhui
authors.initials: Z
authors.lastname: Xia
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China.
authors.forename: Lijia
authors.initials: L
authors.lastname: Liu
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Xu
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China.
authors.forename: Zhongcheng
authors.initials: Z
authors.lastname: Yuan
authors.affiliation: Department of Materials Science and Engineering, Monash University, Clayton, Victoria, 3800, Australia.
authors.forename: Yupeng
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
authors.forename: Henning
authors.initials: H
authors.lastname: Sirringhaus
authors.affiliation: Department of Materials Science and Engineering, Technion, Israel Institute of Technology, Haifa, 3200003, Israel.
authors.forename: Yeshayahu
authors.initials: Y
authors.lastname: Lifshitz
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China.
authors.forename: Shui-Tong
authors.initials: ST
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Monash University, Clayton, Victoria, 3800, Australia.
authors.forename: Qiaoliang
authors.initials: Q
authors.lastname: Bao
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China.
authors.forename: Baoquan
authors.initials: B
authors.lastname: Sun
keywords: field effect; light-induced; perovskite nanoparticles; polarization; solar cells