Bias-dependent degradation of various solar cells: lessons for stability of perovskite photovoltaics

Khenkin, Mark V.; Anoop, K M; Katz, Eugene A.; Visoly‐Fisher, Iris

doi:10.1039/c8ee03475c

Cited by 91 publications

(108 citation statements)

References 87 publications

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“…12 In the presence of moisture, the formed hydrates could change the structure of the LHP crystals, which results in lower light harvesting. 13 Currently, the lifetime of the PSCs has extended from less than hours to 6 months and still, much work is needed before commercialization is viable. 10 A variety of approaches have been applied in order to provide long-term stable PSCs.…”

Section: Introductionmentioning

confidence: 99%

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

Hadadian

Smått

Correa‐Baena

2020

Energy Environ. Sci.

152

113

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Section: Introductionmentioning

confidence: 99%

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

Hadadian

Smått

Correa‐Baena

2020

Energy Environ. Sci.

152

113

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“…Khenkin et al reported that the solar cell has the highest and smallest internal electric field at short and open circuits, respectively. 121 In addition, applying external electric field has also a remarkable influence in the process of photo-induced carrier separation, and a schematic illustration is shown in Figure 16C. Under a positive external electric field, the PCE of halide perovskites can be improved along with increasing separation capability.…”

Section: Electric-field Modulated Halide Perovskite Performancementioning

confidence: 99%

Reviewing and understanding the stability mechanism of halide perovskite solar cells

Zhang

Shen

Guo

et al. 2020

InfoMat

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Finding sustainable and renewable energy to replace traditional fossil fuel is critical for reducing greenhouse gas emission and avoiding environment pollution. Solar cells that convert energy of sunlight into electricity offer a viable route for solving this issue. At present, halide perovskites are the most potential candidate materials for solar cell with considerable power conversion efficiency, whereas their stability remains a challenge. In this work, we summarize four different key factors that influence the stability of halide perovskites: (a) effect of environmental moisture on the degradation of halide perovskites. The performance of halide perovskite solar cells is reduced due to hydrated crystal hinders the diffusion of photo‐generated carriers, which can be solved by materials encapsulation technique; (b) photo‐induced instability. Through uncovering the underlying physical mechanism, we note that materials engineering or novel device structure can extend the working life of halide perovskites under continuous light exposure; (c) thermal stability. Halide perovskites are rapidly degraded into PbI2 and volatile substances as heating due to lower formation energy, whereas hybrid perovskite is little changed; (d) electric field effect in the degradation of halide perovskites. The electric field impacts significantly on the carrier separation, changes direction of photo‐induced currents and generates switchable photovoltaic effect. For each key factor, we have shown in detail the underlying physical mechanisms and discussed the strategies to overcome this stability difficulty. We expect this review from both theoretical and experimental points of view can be beneficial for development of perovskite solar cell materials and promotes practical applications.

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“…The degradation caused by bias voltage is mainly ascribed to the migration of ions present in the halide perovskite (e.g. Iand MA + ) [22]. As a result, the accumulated charges at the interfaces lead to the formation of radicals and the observation of hysteresis in IV curves.…”

Section: Single Stress Factorsmentioning

confidence: 99%

“…As a result, the accumulated charges at the interfaces lead to the formation of radicals and the observation of hysteresis in IV curves. Moreover, the induced external ion diffusion into the transporting layers and metal contacts provoke the formation of carrier traps and detrimental reactions [22][23][24]. In particular, it is reported that a reverse bias voltage of merely −1 to −4 V can cause the breakdown of perovskite solar cells, while the breakdown value for silicon solar cells is around −15 V [24].…”

Section: Single Stress Factorsmentioning

confidence: 99%

Multi-component engineering to enable long-term operational stability of perovskite solar cells

Xie

Lira‐Cantú

2020

J. Phys. Energy

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With a record efficiency above 25%, the main hurdle for the commercialization of perovskite solar cells (PSCs) is their long-term operational stability. Although different strategies have been applied, the stability of PSCs is still far below the 25 year requirement demonstrated by commercial photovoltaic technologies. To advance in the former, a lab-scale stability analysis should resemble real testing conditions, and this is only possible through the interaction of several stress factors. Here, we briefly introduce the reader to the general degradation mechanisms observed on PSCs and the state-of-the-art strategies applied to realize long-term stable devices. Finally, we highlight the imperative need to engineer multiple components of the PSCs simultaneously and propose a rational design of PSC's constituents to obtain long-term operational solar cells. This perspective article will benefit the progression of PSCs as a reliable photovoltaic technology.

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Bias-dependent degradation of various solar cells: lessons for stability of perovskite photovoltaics

Abstract: Understanding degradation mechanisms in halide perovskite solar cells is the key aspect to achieve a breakthrough in photovoltaics.

Cited by 91 publications

References 87 publications

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

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

Reviewing and understanding the stability mechanism of halide perovskite solar cells

Multi-component engineering to enable long-term operational stability of perovskite solar cells

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