Efficient lateral-structure perovskite single crystal solar cells with high operational stability

Abstract

The power conversion efficiency of perovskite polycrystalline thin film solar cells has rapidly increased in recent years, while the stability still lags behind due to its low thermal stability as well as the fast ion migration along the massive grain boundaries. Here, stable and efficient lateral-structure perovskite solar cells (PSCs) are achieved based on perovskite single crystals. By optimizing anode contact with a simple surface treatment, the open circuit voltage and fill factor dramatically increase and promote the efficiency of the devices exceeding 11% (0.05 to 1 Sun) compared to that of 5.9% (0.25 Sun) of the best lateral-structure single crystal PSCs previously reported. Devices show excellent operational stability and no degradation observed after 200 h continuous operation at maximum power point under 1 Sun illumination. Devices with scalable architectures are investigated by utilizing interdigital electrodes, which show huge potential to realize low cost and highly efficient perovskite photovoltaic devices.

The role of carbon-based materials in enhancing the stability of perovskite solar cells

“…243,244 Due to the low energy barriers to ionic transport in LHPs, the ionic migration is a suspected reason for instability of PSCs. 244,245 It has been reported that metal from the metal contact diffuses to LHP through the HSL. 186,246 Several strategies have been explored to hinder the metalmigration-induced degradation of PSCs.…”

Ultrathin Perovskite Monocrystals Boost the Solar Cell Performance

“…[ 20,21 ] Very recently, Dong group demonstrated stable and efficient later‐structure perovskite. [ 22 ] An illuminating statistical paper based on the single crystals from the Chen group called for more research activities in this emerging field. [ 23 ]…”

Stability of MAPbI3 perovskite grown on planar and mesoporous electron-selective contact by inverse temperature crystallization

“…The mesoporous device retained more than 70% of its PCE even aer 5000 h of aging, which is the highest reported stability amongst SC-MAPbI 3 solar cells to the best of our knowledge. 22,23 Further trapping of charges will be minimized due to this micro-structural improvement. Negligible changes could be observed in V OC and FF of the mesoporous devices as shown in Fig.…”