Stability Improvement of Perovskite Homojunction by Inhibiting the Diffusion of Doping Defects

Ji, Jun; Yan, Liang; Wang, Xinxin; Du, S. X.; Liu, Benyu; Huang, Hao; Qu, Shujie; Cui, Peng; Li, Yingfeng; Li, Meicheng

doi:10.1002/solr.202200028

Cited by 7 publications

(7 citation statements)

References 30 publications

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Section: Currently Reported Strategies For Improving the Reverse Bias...mentioning

confidence: 99%

“…The device can withstand a reverse voltages of −2 V, far exceeding the V RB of most PSCs (Figure 13b). Furthermore, Ji et al [28] showed that the E bi and threshold V RB of a Schottky diode are much smaller than those of perovskite homojunction. Subsequently, adding PEAI to perovskite suppresses the defect diffusion related E bi reduction, and the reverse bias stability were significantly improved (Figure 13c).…”

Section: Materials Engineering To Enhance Reverse Bias Stabilitymentioning

confidence: 99%

mentioning

confidence: 99%

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Perovskite Solar Cells in the Shadow: Understanding the Mechanism of Reverse‐Bias Behavior toward Suppressed Reverse‐Bias Breakdown and Reverse‐Bias Induced Degradation

Wang

Huang

Zhou

et al. 2023

Advanced Energy Materials

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to be connected in series to output larger voltage. Like any classical solar cell, when PSCs are connected in series for largearea modules and panels applications, special attention should be paid to the reverse bias electrical stress of the subcells, because excessive reverse bias due to shading effect (Figure 1a,b) is detrimental to the whole module. In the real environment, external factors such as trees, vegetation, dead leaves, wildlife, snow, and dark clouds will shade some units of the modules from the sun light, leading to the shading effect. For PSCs in modules, the shaded cells can be under reverse bias supplied by the other solar light irradiated cells, [2] as the photocurrent of the illuminated cells can flow to the shaded cells as a reverse current (Figure 1c,d), resulting in power dissipation and subcells thermal degradation that deteriorates the power output of the whole panel. [4][5][6] Joule heat generated in this process will even lead to the local irreversible thermal breakdown of the subcells in the shadow. [7][8][9] At present, however, the reverse bias stability issues of PSCs have not been systematically studied yet. Thus, investigating the phenomenon and mechanism of reverse bias behavior of PSCs, as well as the mechanism of reverse bias breakdown, with anticipating to improve the reverse stability of PSCs, is urgently necessary to promote the commercial application of PSCs.Generally, the overall performance of a solar module and panel depends on the beneficial performance of each individual subcell. Four essential parameters measuring the photovoltaic performance of a solar cell are PCE, FF, V oc , and J sc . In actual testing, these parameters are obtained under forward bias scan, which leads to more attention focusing on the forward bias portion of J-V curve than the reverse bias region. It is worth noting that the investigation of the reverse bias region of J-V curve is equally important, as the p-n junction characteristics of the PSCs is also reflected in their reverse bias behavior. [13][14][15][16][17][18] It has been reported that the reverse current density of classical solar cells (such as Si and CIGS) starts to increase abruptly when the reverse bias voltage is large In recent years, the power conversion efficiencies of halide perovskite solar cells (PSCs) have reached 25.7%. Further commercialization puts forward higher requirements for the stability of PSCs under different stresses. Current research on the stability of PSCs predominantly focuses on investigating the effects of temperature, humidity, oxygen, ultraviolet light, and electrical bias stress, while stability under reverse bias has been poorly studied among the many factors. When large-area application of PSCs panels occurs, the shading effect and local hot spots of PSCs modules in real scenarios all indicate that the research on reverse bias stability of PSCs is urgently needed. Within this review, a bird's-eye view of the recent advances on the reverse bias stability issue and reverse bias behavior of PSCs is obtai...

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Section: Currently Reported Strategies For Improving the Reverse Bias...mentioning

confidence: 99%

Section: Materials Engineering To Enhance Reverse Bias Stabilitymentioning

confidence: 99%

See 1 more Smart Citation

Perovskite Solar Cells in the Shadow: Understanding the Mechanism of Reverse‐Bias Behavior toward Suppressed Reverse‐Bias Breakdown and Reverse‐Bias Induced Degradation

Wang

Huang

Zhou

et al. 2023

Advanced Energy Materials

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show abstract

“…[2][3][4] Since then, PS solar cells have attracted more and more attention and made breakthroughs in the photoelectric conversion performance. [5][6][7] The power conversion efficiencies (PCEs) of PS solar cells have reached 25.7%. 8 Although a number of studies have researched materials related to MAPbI 3 and found their outstanding performance in photoelectric conversion, there are still challenges especially for the low stability in humid and thermal environments.…”

Section: Introductionmentioning

confidence: 99%

“…2–4 Since then, PS solar cells have attracted more and more attention and made breakthroughs in the photoelectric conversion performance. 5–7 The power conversion efficiencies (PCEs) of PS solar cells have reached 25.7%. 8…”

Section: Introductionmentioning

confidence: 99%