Efficient hole-conductor-free, fully printable mesoscopic perovskite solar cells with a broad light harvester NH2CHNH2PbI3

Hu, Min; Liu, Linfeng; Mei, Anyi; Yang, Ying; Liu, Tongfa; Han, Hongwei

doi:10.1039/c4ta03741c

Cited by 194 publications

(145 citation statements)

References 32 publications

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“…So far, this is the highest reported PCE value for carbon-based HTM-free PSCs. [18][19][20][21]28,29,[31][32][33][34][35][36][46][47][48][49] Forward scanning J-V curve was also recorded to check for possible J-V hysteresis behavior. [ 69 ] As can be seen, the hysteresis is quite small for our devices; the forward scanning J-V curve gives a PCE of 13.11%, yielding a V oc of 1.04 V, J sc of 22.11 mA cm −2 , and FF of 0.57.…”

Section: Resultsmentioning

confidence: 99%

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Solvent Engineering Boosts the Efficiency of Paintable Carbon‐Based Perovskite Solar Cells to Beyond 14%

Chen

Wei

et al. 2016

Advanced Energy Materials

326

205

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hole transport materials (HTMs), and metal contact electrode. Discouragingly, the conventional organic HTMs (e.g., spiro-OMeTAD) are usually expensive and unstable. The noble metal electrode is also costly and requires vacuum thermal evaporation device. These problems will hinder the commercialization of PSCs in the future. Fortunately, it was found that HTM-free PSCs could also operate efficiently since the unique ambipolar property of the perovskite allows it to serve not only as a light harvester but also as a hole conductor. [12][13][14][15][16][17] In particular, carbon-based HTM-free PSCs show much promise to solve the above-mentioned problems because carbon materials are earth abundant, low-cost, and environmentally stable. [ 11,[18][19][20][21][22][23][24][25][26] To date, the most effi cient (PCE ≈ 13%) carbon-based PSCs were reported by Han and colleagues. [ 18,19,21,27 ] In these devices, a TiO 2 scaffold layer, a porous ZrO 2 insulating layer, and a porous carbon electrode were sequentially deposited, followed by infi ltration of a perovskite precursor solution. In our previous works, we have simplifi ed the architecture and the fabrication process of the carbon-based PSCs by eliminating the ZrO 2 insulating layer and depositing the perovskite layer by the two-step method, [ 20,[28][29][30] demonstrating the PCE at ≈11%. [ 20,29,30 ] Very recently, a paintable carbon-based PSC was reported by several groups, [31][32][33][34][35] which was fabricated by fi rst depositing the perovskite layer and then printing the carbon electrode with a pre-prepared carbon paste, as illustrated in Figure 1 and Figure S1 (Supporting Information). The whole process is simple, at low temperature and low cost, apparently compatible with roll-to-roll production. However, the PCE of the paintable carbon-based PSCs is relatively low, viz., ≤10%. [31][32][33][34][35][36] Plausibly, the most important limiting factor for achieving high-effi ciency of the paintable carbon-based PSCs lies in the poor contact at perovskite/carbon interface because of the postdeposition process of carbon electrode, which seriously decreases fi ll factor (FF). [31][32][33][34] In order to tackle such a contact problem, it is necessary to produce an even perovskite layer to afford intimate contact at the perovskite/carbon interface. Onestep method has been successfully applied to prepare an even perovskite layer on planer PSCs. [ 8,[37][38][39] However, this method is unsuitable for depositing a good pore-fi lling perovskite layer in a relatively thick mesoscopic TiO 2 scaffold required for the Carbon-based hole transport material (HTM)-free perovskite solar cells (PSCs) have shown much promise for practical applications because of their high stability and low cost. However, the effi ciencies of this kind of PSCs are still relatively low, especially for the simplest paintable carbon-based PSCs, in comparison with the organic HTM-based PSCs. This can be imputed to the perovskite deposition methods that are not very suitable for this kind of devices. A...

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Section: Resultsmentioning

confidence: 99%

“…As a result, a pure perovskite layer with an even surface was obtained, which afforded a better contact at the perovskite/carbon interface, leading to a remarkable PCE of 14.38%, the highest reported thus far for carbon-based HTMfree PSCs. [18][19][20][21]28,29,[31][32][33][34][35][46][47][48][49] …”

Section: Introductionmentioning

confidence: 99%

Solvent Engineering Boosts the Efficiency of Paintable Carbon‐Based Perovskite Solar Cells to Beyond 14%

Chen

Wei

et al. 2016

Advanced Energy Materials

326

205

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“…[1][2][3][4][5] While methylammonium lead triiodide (CH 3 NH 3 PbI 3 or MAPbI 3 ) with a bandgap of ~1.55 eV has been the most widely studied, [1][2][3][4] formamidinium lead triiodide (HC(NH 2 ) 2 PbI 3 or FAPbI 3 ) perovskite is gaining increasing interest for its boarder light absorption. [6][7][8][9][10][11][12][13][14] Since these polycrystalline perovskites in thin-film form are typically grown from a precursor solution for PSCs application, the understanding of their crystallization behavior is considered critical, and as such, extensive research has been pursued in the context of the MAPbI 3 perovskite. 15,16 However, due to the polymorphism in FAPbI 3 at ambient temperature 7,9,11,17 , the understanding of the crystallization behavior of the monomorphic MAPbI 3 perovskite (space group I4/mcm) 18 cannot be simply generalized to FAPbI 3 .…”

Section: Introductionmentioning

confidence: 99%

Additive-Modulated Evolution of HC(NH₂)₂PbI₃ Black Polymorph for Mesoscopic Perovskite Solar Cells

et al. 2015

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Formamidinium lead triiodide (HC(NH 2 ) 2 PbI 3 or FAPbI 3 ) is gaining increasing interest in the field of mesoscopic perovskite solar cells (PSCs) for its broader light absorption compared with the more widely studied CH 3 NH 3 PbI 3 (MAPbI 3 ). Since FAPbI 3 has two polymorphs ('black' α-FAPbI 3 and 'yellow' δ-FAPbI 3 ) at ambient temperature, where α-FAPbI 3 is the desirable photoactive perovskite phase, it becomes particularly important to suppress the formation of the non-perovskite δ-FAPbI 3 for achieving high efficiency in FAPbI 3 -based mesoscopic PSCs. In this study, we demonstrate that the judicious use of low-volatility additives in the precursor solution assists in the evolution of α-FAPbI 3 through the formation of non-δ-intermediate phases, which then convert to α-FAPbI 3 during thermal annealing. The underlying mechanism involved in the additive-modulated evolution of α-FAPbI 3 upon mesoporous TiO 2 substrates is elucidated, which suggests guidelines for developing protocols for the fabrication efficient FAPbI 3 -based mesoscopic PSCs.

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“…Further studies [25]. Several groups have reported outstanding efficiency (up to 17.9%) based on FAPbI 3 or its mixture [25][26][27][28][29]. However, the high temperature of TiO 2 process in this n-i-p configuration has hindered the promotion of popular flexible devices [30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 95%

Initiating crystal growth kinetics of α-HC(NH2)2PbI3 for flexible solar cells with long-term stability

et al. 2016

Nano Energy

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Efficient hole-conductor-free, fully printable mesoscopic perovskite solar cells with a broad light harvester NH₂CHNH₂PbI₃

Abstract: Formamidinium lead trihalide perovskite (FAPbI3) was successfully introduced into hole-conductor-free, fully printable mesoscopic perovskite solar cells with a carbon counter electrode.

Cited by 194 publications

References 32 publications

Solvent Engineering Boosts the Efficiency of Paintable Carbon‐Based Perovskite Solar Cells to Beyond 14%

Solvent Engineering Boosts the Efficiency of Paintable Carbon‐Based Perovskite Solar Cells to Beyond 14%

Additive-Modulated Evolution of HC(NH₂)₂PbI₃ Black Polymorph for Mesoscopic Perovskite Solar Cells

Initiating crystal growth kinetics of α-HC(NH2)2PbI3 for flexible solar cells with long-term stability

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Efficient hole-conductor-free, fully printable mesoscopic perovskite solar cells with a broad light harvester NH2CHNH2PbI3

Abstract: Formamidinium lead trihalide perovskite (FAPbI3) was successfully introduced into hole-conductor-free, fully printable mesoscopic perovskite solar cells with a carbon counter electrode.

Cited by 194 publications

References 32 publications

Solvent Engineering Boosts the Efficiency of Paintable Carbon‐Based Perovskite Solar Cells to Beyond 14%

Solvent Engineering Boosts the Efficiency of Paintable Carbon‐Based Perovskite Solar Cells to Beyond 14%

Additive-Modulated Evolution of HC(NH2)2PbI3 Black Polymorph for Mesoscopic Perovskite Solar Cells

Initiating crystal growth kinetics of α-HC(NH2)2PbI3 for flexible solar cells with long-term stability

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Efficient hole-conductor-free, fully printable mesoscopic perovskite solar cells with a broad light harvester NH₂CHNH₂PbI₃

Additive-Modulated Evolution of HC(NH₂)₂PbI₃ Black Polymorph for Mesoscopic Perovskite Solar Cells