High-efficiency and stable piezo-phototronic organic perovskite solar cell.

Ke Gu,Lijie Li,Yan Zhang,Dongqi Zheng

doi:10.1039/c8ra00520f

Abstract

Perovskite materials are regarded as next-generation organic photovoltaic (OPV) materials due to their excellent physical and chemical properties. Recent theoretical and experimental advances also revealed the piezoelectric properties of CH3NH3PbI3 perovskite thin films. In this work, a CH3NH3PbI3 perovskite piezo-phototronic solar cell is studied in theory. The output parameters such as open circuit voltage, current–voltage characteristics, fill factor, power conversion efficiency, and maximum output power with external strains are presented. The coefficient to characterize piezo-phototronic modulation is also calculated for the piezo-phototronic solar cell. With the change of strain, the output performance can be controlled and enhanced. This principle can offer not only a novel and unique approach to produce high-performance, stable perovskite solar cells, but also a principle to design new piezoelectric perovskite optoelectronic devices.

Highlights

IntroductionOrganic photovoltaic (OPV) devices have been leading the research into energy science and technology.[1,2,3] In recent years, much attention has been devoted to the perovskite materials and their applications in solar energy conversion because of their high absorbance, low carrier recombination rate, outstanding ferroelectric properties and easier synthesis.[4,5,6] Among them, perovskite solar cells (PSC) with CH3NH3PbX3 perovskites (X 1⁄4 Cl, Pb, and I) as absorber layers show great potential in fabricating low-cost and large-scale commercial solar cells, whose efficiency has increased from 3.8% to over 22% in the past ve years.[7,8,9,10]
Recent breakthrough in photovoltaic devices has developed a stable and durable CH3NH3PbI3 perovskite solar cell with a stable efficiency of 8%, which overcomes the problem of perovskite solar cells (PSC)'s application in the ambient environment.[19]
The characteristic parameters to measure the performance of solar cells, such as current–voltage characteristics, open circuit voltage, maximum output power, ll factor, and power conversion efficiency are studied

Summary

Introduction

Organic photovoltaic (OPV) devices have been leading the research into energy science and technology.[1,2,3] In recent years, much attention has been devoted to the perovskite materials and their applications in solar energy conversion because of their high absorbance, low carrier recombination rate, outstanding ferroelectric properties and easier synthesis.[4,5,6] Among them, perovskite solar cells (PSC) with CH3NH3PbX3 perovskites (X 1⁄4 Cl, Pb, and I) as absorber layers show great potential in fabricating low-cost and large-scale commercial solar cells, whose efficiency has increased from 3.8% to over 22% in the past ve years.[7,8,9,10]. Recent breakthrough in photovoltaic devices has developed a stable and durable CH3NH3PbI3 perovskite solar cell with a stable efficiency of 8%, which overcomes the problem of PSC's application in the ambient environment.[19] CH3NH3PbI3 thin lms have the piezoelectric properties in recent experiments.[20]. In piezo-phototronic solar cell, piezoelectric charges increase the built-in electric eld, which can efficiently enhance the separation of electron–hole pairs and improve the carrier management.[15] The piezo-phototronic perovskite solar cells can be a promising candidate for exible OPV devices. This work provides a prototype of the perovskite piezophototronic solar cell, which has improved performances by applying piezoelectric and photovoltaic properties of CH3NH3PbI3 thin lms. The characteristic parameters to measure the performance of solar cells, such as current–voltage characteristics, open circuit voltage, maximum output power, ll factor, and power conversion efficiency are studied. The principle of piezo-phototronic solar cell can offer a unique and novel approach to produce an organic photovoltaic cell with stability, higher efficiency and lower cost

Piezo-phototronic modulation on PPSC

Results and discussion

Conclusion