Charge Compensating Defects in Methylammonium Lead Iodide Perovskite Suppressed by Formamidinium Inclusion

Shrestha, Niraj; Song, Zhaoning; Chen, Cong; Bastola, Ebin; Wang, Xiaoming; Yan, Yanfa; Ellingson, Randy J.

doi:10.1021/acs.jpclett.9b03234

Cited by 17 publications

(21 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…transport in the device. [111,[113][114][115] With the progress of fundamental understanding, several reports developed high-quality electron transport materials to improve charge extraction processes of PSCs in colder environment. [113,116] The improved photovoltaic performance of 25.2% was obtained in FAMACsbased PSCs at 220 K and the device showed a PCE of 22.4% with a V oc of 1.173 V, a J sc of 24.15 mA cm −2 , and a FF of 78.9% at room temperature (300 K).…”

Section: Temperature Extremes and Thermal Cyclingmentioning

confidence: 99%

“…Previous studies found that PSCs could work at low temperature. [110,111,[113][114][115] But the photovoltaic performance degraded with a decrease in temperature from 300 to 80 K. [101] As mentioned above, temperature not only affects the physical and chemical properties of materials but also influences the charge generation, recombination, and transport in devices. Among the possible factors causing this attenuation at low temperature are: i) A charge injection barrier at the electrode interface, ii) a charge separation barrier at ETL/perovskite interface, and iii) unbalanced charge www.advmat.de www.advancedsciencenews.com Figure 12.…”

Section: Temperature Extremes and Thermal Cyclingmentioning

confidence: 99%

“…Among the possible factors causing this attenuation at low temperature are: i) A charge injection barrier at the electrode interface, ii) a charge separation barrier at ETL/perovskite interface, and iii) unbalanced charge transport in the device. [ 111,113–115 ] With the progress of fundamental understanding, several reports developed high‐quality electron transport materials to improve charge extraction processes of PSCs in colder environment. [ 113,116 ] The improved photovoltaic performance of 25.2% was obtained in FAMACs‐based PSCs at 220 K and the device showed a PCE of 22.4% with a V oc of 1.173 V, a J sc of 24.15 mA cm −2 , and a FF of 78.9% at room temperature (300 K).…”

Section: Effect Of the High Vacuum And Alternating Temperaturementioning

confidence: 99%

See 2 more Smart Citations

Perovskite Solar Cells for Space Applications: Progress and Challenges

et al. 2021

Advanced Materials

246

166

View full text Add to dashboard Cite

The general chemical formula of metal halide perovskite is ABX 3 , where A is a monovalent cation (such as FA + [ formamidinium], MA + [methylammonium], or Cs + ), B is a divalent metal cation (such as Pb 2+ , Sn 2+ , or Ge 2+ ), and X is a monovalent halogen anion (such as I − , Br − , or Cl − ). [9] Photovoltaic devices based on perovskite absorbers have achieved a certified power conversion efficiency (PCE) of 25.5% [10] in single-junction devices and obtained a PCE above 26.7% [11] in tandem devices, in which the best PCE is comparable to those of some commercially available products on the photovoltaic market, such as crystalline silicon (HIT, champion PCE of 26.7%), cadmium telluride (CdTe, champion PCE of 22.1%), gallium arsenide (GaAs, champion PCE of 27.8%), and copper indium gallium selenide (CIGS, champion PCE of 23.4%) solar cells. In particular, only sub-micron-thick absorber is needed in perovskite solar cells because of perovskite's high optical absorption coefficient of about 10 4 cm −1 , [12] therefore high specific power is expected. Combined with the low-temperature solution processability and radiation resistance, [13] these features render PSCs as a Metal halide perovskites have aroused burgeoning interest in the field of photovoltaics owing to their versatile optoelectronic properties. The outstanding power conversion efficiency, high specific power (i.e., power to weight ratio), compatibility with flexible substrates, and excellent radiation resistance of perovskite solar cells (PSCs) enable them to be a promising candidate for next-generation space photovoltaic technology. Nevertheless, compared with other practical space photovoltaics, such as silicon and III-V multi-junction compound solar cells, the research on PSCs for space applications is just in the infancy stage. Therefore, there are considerable interests in further strengthening relevant research from the perspective of both mechanism and technology. Consequently, the approaches used for and the consequences of PSCs for space applications are reviewed. This review provides an overview of recent progress in PSCs for space applications in terms of performance evolution and mechanism exploration of perovskite films and devices under space extreme environments.

show abstract

Section: Temperature Extremes and Thermal Cyclingmentioning

confidence: 99%

Section: Temperature Extremes and Thermal Cyclingmentioning

confidence: 99%

Section: Effect Of the High Vacuum And Alternating Temperaturementioning

confidence: 99%

See 1 more Smart Citation

Perovskite Solar Cells for Space Applications: Progress and Challenges

et al. 2021

Advanced Materials

246

166

View full text Add to dashboard Cite

show abstract

“…For example, increasing the size of the A‐site cation from Cs + to MA to FA narrows the bandgap due to decreased octahedral tilting. [ 8,9 ] Furthermore, cryogenic studies have demonstrated that the A‐site cation also impacts the temperature‐dependent optical [ 10–17 ] and structural properties. [ 14,15,18–24 ] Temperature‐dependent neutron/X‐ray diffraction and photoluminescence (PL) measurements on MAPbBr 3 revealed that the MA cation transformation from an ordered to a disordered state is correlated with an increased integrated PL intensity, and is also suggested to induce the orthorhombic to tetragonal phase transition.…”

Section: Introductionmentioning

confidence: 99%

Mixed Dimethylammonium/Methylammonium Lead Halide Perovskite Crystals for Improved Structural Stability and Enhanced Photodetection

et al. 2022

View full text Add to dashboard Cite

The solvent acidolysis crystallization technique is utilized to grow mixed dimethylammonium/methylammonium lead tribromide (DMA/MAPbBr3) crystals reaching the highest dimethylammonium incorporation of 44% while maintaining the 3D cubic perovskite phase. These mixed perovskite crystals show suppression of the orthorhombic phase and a lower tetragonal‐to‐cubic phase‐transition temperature compared to MAPbBr3. A distinct behavior is observed in the temperature‐dependent photoluminescence properties of MAPbBr3 and mixed DMA/MAPbBr3 crystals due to the different organic cation dynamics governing the phase transition(s). Furthermore, lateral photodetectors based on these crystals show that, at room temperature, the mixed crystals possess higher detectivity compared to MAPbBr3 crystals caused by structural compression and reduced surface trap density. Remarkably, the mixed‐crystal devices exhibit large enhancement in their detectivity below the phase‐transition temperature (at 200 K), while for the MAPbBr3 devices only insignificant changes are observed. The high detectivity of the mixed crystals makes them attractive for visible‐light communication and for space applications. The results highlight the importance of the synthetic technique for compositional engineering of halide perovskites that governs their structural and optoelectronic properties.

show abstract

“…[ 21 ] Interestingly, the formation of such charge‐compensating Schottky defects can be influenced and even suppressed by the gradual incorporation of FA into MAPbI 3 . [ 22 ] For a general overview of the impact of native defects on the structural stability and the optoelectronic properties of metal halide perovskite solar cells, we refer to recent reviews. [ 23 ]…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence of Bound‐Exciton Complexes and Assignment to Shallow Defects in Methylammonium/Formamidinium Lead Iodide Mixed Crystals

Francisco‐López

Charles

Alonso

et al. 2021

Advanced Optical Materials

View full text Add to dashboard Cite

The high defect tolerance of metal halide perovskites, in terms of their exceptional optoelectronic properties, is assumed to be due to the very fact that most native point defects are shallow, which does not contribute to the non‐radiative recombination of free carriers. Here, a systematic study is presented, which concerns the evolution of shallow‐defect signatures observed at low temperatures in the photoluminescence (PL) spectra of mixed organic‐cation lead iodide perovskite single crystals (FAxMA1−xPbI3, where MA stands for methylammonium and FA for formamidinium). Below ≈100 K, a number of peak‐like features become clearly apparent in the PL spectra at energies lower than the strong free‐exciton emission, which are related to the radiative recombination of bound exciton complexes associated with native shallow defects (donors and/or acceptors). Based on state‐of‐the‐art ab initio calculations, a tentative assignment is provided for all PL features to different shallow‐defects (Pb, I, and MA vacancies as well as I interstitials) typically present in hybrid perovskites. The defect‐related signatures exhibit a clear trend regarding the mixed‐crystal composition, indicating that the material becomes less prone to defect formation with increasing FA content.

show abstract

Charge Compensating Defects in Methylammonium Lead Iodide Perovskite Suppressed by Formamidinium Inclusion

Cited by 17 publications

References 54 publications

Perovskite Solar Cells for Space Applications: Progress and Challenges

Perovskite Solar Cells for Space Applications: Progress and Challenges

Mixed Dimethylammonium/Methylammonium Lead Halide Perovskite Crystals for Improved Structural Stability and Enhanced Photodetection

Photoluminescence of Bound‐Exciton Complexes and Assignment to Shallow Defects in Methylammonium/Formamidinium Lead Iodide Mixed Crystals

Contact Info

Product

Resources

About