Stability Issues on Perovskite Solar Cells

Abstract

Organo lead halide perovskite materials like methylammonium lead iodide (CH3NH3PbI3) and formamidinium lead iodide (HC(NH2)2PbI3) show superb opto-electronic properties. Based on these perovskite light absorbers, power conversion efficiencies of the perovskite solar cells employing hole transporting layers have increased from 9.7% to 20.1% within just three years. Thus, it is apparent that perovskite solar cell is a promising next generation photovoltaic technology. However, the unstable nature of perovskite was observed when exposing it to continuous illumination, moisture and high temperature, impeding the commercial development in the long run and thus becoming the main issue that needs to be solved urgently. Here, we discuss the factors affecting instability of perovskite and give some perspectives about further enhancement of stability of perovskite solar cell.

Light stability tests of CH3NH3PbI3 perovskite solar cells using porous carbon counter electrodes

“…Afterwards, the perovskite solar cells were investigated intensively and found to be over 20% conversion-efficiency solar cells [4][5][6][7][8]. However, the CH 3 NH 3 PbI 3 perovskite crystal can react with water to be PbI 2 [9][10][11]. However, the CH 3 NH 3 PbI 3 perovskite crystal can react with water to be PbI 2 [9][10][11].…”

Characterization and Photovoltaic Properties of BiFeO3 Thin Films

“…However, the η was quite small compared to the previous report [9]. As one of the possible reasons for the low conversion efficiency, external factors such as temperature, humidity, and fabrication process were considered [40]. An IPCE spectrum of the FTO/BiFeO 3 /CH 3 NH 3 PbI 3 /spiro-OMeTAD/Au photovoltaic device is shown in Figure 4b.…”

Perovskite Solar Cells: Progress and Advancements

“…Addition of small amount of Cs to MA/FA mixtures suppresses the device degradation occurring due to phase separation and also improves the device performance significantly [30]. the devices are exposed to moisture, continuous illumination, thermal-stress and oxygen [40,[107][108][109][110][111][112][113]. The basic degradation mechanism in PSCs is the breakdown of perovskite material under moisture or heat stress, which results in the segregation of MAPbI3 into its constituents PbI2 and MAI [114][115][116].…”