Photovoltaic efficiency enhancement of polycrystalline silicon solar cells by a highly stable luminescent film

Abstract

Si-based solar cells have dominated the entire photovoltaic market, but remain suffering from low power conversion efficiency (PCE), partly because of the poor utilization of ultraviolet (UV) light. Europium(III) (Eu 3+) complexes with organic ligands are capable of converting UV light into strong visible light, which makes them ideal light converter to increase the efficiency of solar cells. However, the low stability of such complexes seriously hampers their practical applications. In this work, we report a highly stable and luminescent ethylene-vinyl acetate (EVA) copolymer film consisting of a Eu 3+ complex as a down-shift material, Eu (ND) 4 CTAC (ND = 4-hydroxy-2-methyl-1,5-naphthyridine-3carbonitrile, CTAC = hexadecyl trimethyl ammonium chloride), coating of which onto the surface of large area polycrystalline silicon solar cells (active area: 110 cm 2) results in an increase of PCE from 15.06% to 15.57%. Remarkable stability of the luminescent film was also demonstrated under lightsoaking test for 500 h, and no obvious luminescence degradation can be observed. The remarkable enhancement of the conversion efficiency by 0.51% absolute on such a large active area, together with the high stability of the luminescent film, demonstrates a prospect for the implementation of the films in photovoltaic industry.

溶液法制备硅/SnCl2处理的Ti3C2TxMXene肖特基结 太阳电池

“…On the other hand, as one family of advanced two-dimensional (2D) materials, MXenes have gained extensive attention because of their similar properties to graphene including excellent electrical and optical properties [27][28][29][30][31][32][33][34]. Moreover, the work function (WF) of MXenes can be easily tuned in a broad range, e.g., from <2 eV to >6 eV for the Ti 3 C 2 T x MXene by adjusting the surfaceterminating groups [35][36][37][38], indicating the potential as a carrierselective material [39,40]. In addition, abundant raw materials can be used to produce high-quality MXenes just by the costeffective wet-etching method [41][42][43][44][45].…”

A facile approach for the creation of heteroionic lanthanidomesogens-containing uniform films with enhanced luminescence efficiency

“…This enthusiasm is due to their unique photophysical properties, such as high color uniformity (Δλ ≤ 10 nm), fixed radiation wavelength, long lifetime (~ms), and intense luminescence. Thereby, they are widely used in various fields of science and nanotechnology as sensors, biological markers, light converters, in OLED technologies, etc [1][2][3][4][5][6].…”

Spray Coating Luminescence Layers on Glass for Si Solar Cells Efficiency Enhancement

“…An efficiency increase of few percentage points is a big achievement [20]. Recent advances comprise, e.g., a 0.51% efficiency increase in a large area crystalline silicon solar cell when coated with EVA copolymer film containing Eu 3+ [21]. Another recent successful implementation of the rare-earth ions has been reported in [22], where the incorporation of the europium-activated nanophosphors resulted in over 3 percentage points increase in the perovskite solar cell efficiency.…”